Xu, Jing; Huang, Junjie; Chen, Alatancang Fredholm properties of a class of coupled operator matrices and their applications. (English) Zbl 07822065 Ann. Funct. Anal. 15, No. 2, Paper No. 12, 18 p. (2024). MSC: 47A53 34L05 PDFBibTeX XMLCite \textit{J. Xu} et al., Ann. Funct. Anal. 15, No. 2, Paper No. 12, 18 p. (2024; Zbl 07822065) Full Text: DOI
Howard, Peter; Sukhtayev, Alim Renormalized oscillation theory for linear Hamiltonian systems on \([0, 1]\) via the Maslov index. (English) Zbl 07818470 J. Dyn. Differ. Equations 36, No. 1, 535-575 (2024). MSC: 34-XX 05-XX PDFBibTeX XMLCite \textit{P. Howard} and \textit{A. Sukhtayev}, J. Dyn. Differ. Equations 36, No. 1, 535--575 (2024; Zbl 07818470) Full Text: DOI arXiv
Abdmouleh, Faiçal; Bahloul, Aymen; Walha, Ines B-essential spectra of operators matrix block \(3\times 3\) applied to a radiative transfer equations in a channel. (English) Zbl 07813040 Bull. Sci. Math. 191, Article ID 103400, 30 p. (2024). MSC: 47A08 47A10 47A53 85A25 PDFBibTeX XMLCite \textit{F. Abdmouleh} et al., Bull. Sci. Math. 191, Article ID 103400, 30 p. (2024; Zbl 07813040) Full Text: DOI
Balazs, Peter; Shamsabadi, Mitra; Arefijamaal, Ali Akbar; Chardon, Gilles Representation of operators using fusion frames. (English) Zbl 07796946 Appl. Comput. Harmon. Anal. 68, Article ID 101596, 28 p. (2024). MSC: 47A67 42C15 PDFBibTeX XMLCite \textit{P. Balazs} et al., Appl. Comput. Harmon. Anal. 68, Article ID 101596, 28 p. (2024; Zbl 07796946) Full Text: DOI arXiv
Engström, Christian; Torshage, Axel Spectral properties of a class of operator functions with applications to the Moore-Gibson-Thompson equation with memory. (English) Zbl 07787739 J. Math. Anal. Appl. 532, No. 2, Article ID 127978, 19 p. (2024). MSC: 47Axx 35Pxx 35Qxx PDFBibTeX XMLCite \textit{C. Engström} and \textit{A. Torshage}, J. Math. Anal. Appl. 532, No. 2, Article ID 127978, 19 p. (2024; Zbl 07787739) Full Text: DOI
Howard, Peter The Maslov index and spectral counts for linear Hamiltonian systems on \(\mathbb{R}\). (English) Zbl 07729190 J. Dyn. Differ. Equations 35, No. 3, 1947-1991 (2023). Reviewer: Abderrazek Benhassine (Monastir) MSC: 37J51 34B24 53D12 PDFBibTeX XMLCite \textit{P. Howard}, J. Dyn. Differ. Equations 35, No. 3, 1947--1991 (2023; Zbl 07729190) Full Text: DOI arXiv
Zakora, D. A. Spectral properties of the operator in the problem of oscillations in a mixture of viscous compressible fluids. (English. Russian original) Zbl 07709452 Differ. Equ. 59, No. 4, 473-490 (2023); translation from Differ. Uravn. 59, No. 4, 467-482 (2023). MSC: 35Q35 76N10 76T30 76M22 35P30 35P20 35B05 35B40 PDFBibTeX XMLCite \textit{D. A. Zakora}, Differ. Equ. 59, No. 4, 473--490 (2023; Zbl 07709452); translation from Differ. Uravn. 59, No. 4, 467--482 (2023) Full Text: DOI
Ammari, Kaïs; Liu, Zhuangyi; Shel, Farhat Note on stability of an abstract coupled hyperbolic-parabolic system: singular case. (English) Zbl 07701289 Appl. Math. Lett. 141, Article ID 108599, 7 p. (2023). MSC: 47A10 35B35 35K90 35L90 47D03 PDFBibTeX XMLCite \textit{K. Ammari} et al., Appl. Math. Lett. 141, Article ID 108599, 7 p. (2023; Zbl 07701289) Full Text: DOI arXiv
Abdmouleh, Faiçal; Bahloul, Aymen; Walha, Ines B-essential spectra of \(2 \times 2\) block operator matrix pencils. (English) Zbl 1523.47008 Georgian Math. J. 30, No. 2, 161-172 (2023). MSC: 47A08 47A56 47A10 47A53 47N20 PDFBibTeX XMLCite \textit{F. Abdmouleh} et al., Georgian Math. J. 30, No. 2, 161--172 (2023; Zbl 1523.47008) Full Text: DOI
Chavan, Sameer; Gupta, Rajeev; Sinha, Kalyan B. Weighted join operators on directed trees. (English) Zbl 07662968 Complex Anal. Oper. Theory 17, No. 3, Paper No. 36, 102 p. (2023). MSC: 47B37 47B15 47H06 05C20 47B20 PDFBibTeX XMLCite \textit{S. Chavan} et al., Complex Anal. Oper. Theory 17, No. 3, Paper No. 36, 102 p. (2023; Zbl 07662968) Full Text: DOI arXiv
Du, Yanyan; Huang, Junjie Essential spectra of upper triangular relation matrices. (English) Zbl 1511.47001 Monatsh. Math. 200, No. 1, 43-61 (2023). MSC: 47A06 47A10 47A55 PDFBibTeX XMLCite \textit{Y. Du} and \textit{J. Huang}, Monatsh. Math. 200, No. 1, 43--61 (2023; Zbl 1511.47001) Full Text: DOI
Ellouz, Hanen; Feki, Ines; Jeribi, Aref On the closedness and self-adjointness of \(3 \times 3\) operator matrices and application to a non-relativistic three-channel potential scattering model. (English) Zbl 1503.35194 Asymptotic Anal. 130, No. 3-4, 409-426 (2022). MSC: 35Q40 81Q05 81V35 81U05 PDFBibTeX XMLCite \textit{H. Ellouz} et al., Asymptotic Anal. 130, No. 3--4, 409--426 (2022; Zbl 1503.35194) Full Text: DOI
Ammar, Aymen; Ezzadam, Aicha; Jeribi, Aref A characterization of the essential spectra of \(2\times 2\) block matrices of linear relations. (English) Zbl 07595369 Bull. Iran. Math. Soc. 48, No. 5, 2463-2485 (2022). MSC: 47A06 PDFBibTeX XMLCite \textit{A. Ammar} et al., Bull. Iran. Math. Soc. 48, No. 5, 2463--2485 (2022; Zbl 07595369) Full Text: DOI
Bouzidi, Sana; Moalla, Nedra; Walha, Ines Spectral analysis of perturbed Fredholm operators. (English) Zbl 1500.47019 Complex Anal. Oper. Theory 16, No. 6, Paper No. 87, 27 p. (2022). MSC: 47A53 47A55 47A10 34K08 PDFBibTeX XMLCite \textit{S. Bouzidi} et al., Complex Anal. Oper. Theory 16, No. 6, Paper No. 87, 27 p. (2022; Zbl 1500.47019) Full Text: DOI
Moalla, Nedra; Selmi, Wafa On a characterization of Jeribi, Rakočević, Schechter, Schmoeger and Wolf essential spectra of a \(3 \times 3\) block operator matrices with non diagonal domain and application. (English) Zbl 07533189 Oper. Matrices 16, No. 1, 123-140 (2022). MSC: 47A08 47A10 47A53 34K08 PDFBibTeX XMLCite \textit{N. Moalla} and \textit{W. Selmi}, Oper. Matrices 16, No. 1, 123--140 (2022; Zbl 07533189) Full Text: DOI
Miloud Hocine, K. Boundary value matrix problems and Drazin invertible operators. (English) Zbl 1504.47025 Mat. Stud. 57, No. 1, 16-22 (2022). MSC: 47A50 47A08 PDFBibTeX XMLCite \textit{K. Miloud Hocine}, Mat. Stud. 57, No. 1, 16--22 (2022; Zbl 1504.47025) Full Text: DOI
Ferjani, Imen; Jeribi, Aref; Krichen, Bilel Spectral properties for generalized weakly \(S\)-demicompact operators. (English) Zbl 07491080 Linear Multilinear Algebra 70, No. 4, 606-624 (2022). MSC: 47A53 47A10 PDFBibTeX XMLCite \textit{I. Ferjani} et al., Linear Multilinear Algebra 70, No. 4, 606--624 (2022; Zbl 07491080) Full Text: DOI
Ferjani, Imen; Jeribi, Aref; Krichen, Bilel Generalized weak demicompactness involving measure of non-strict-singularity. (English) Zbl 07423849 Indian J. Pure Appl. Math. 52, No. 2, 529-541 (2021). MSC: 47A53 47A10 PDFBibTeX XMLCite \textit{I. Ferjani} et al., Indian J. Pure Appl. Math. 52, No. 2, 529--541 (2021; Zbl 07423849) Full Text: DOI
Belguith, Marwa; Moalla, Nedra Spectral theory of \(2\times 2\) matrix with entries in a Banach algebra. (English) Zbl 1522.47031 Rend. Circ. Mat. Palermo (2) 70, No. 1, 121-135 (2021). MSC: 47A55 47A53 46H99 15B99 58B15 58J20 PDFBibTeX XMLCite \textit{M. Belguith} and \textit{N. Moalla}, Rend. Circ. Mat. Palermo (2) 70, No. 1, 121--135 (2021; Zbl 1522.47031) Full Text: DOI
Ammar, Aymen; Jeribi, Aref; Saadaoui, Bilel Some decomposition for multivalued matrix pencils linear operator. (English) Zbl 07342800 Bol. Soc. Mat. Mex., III. Ser. 27, No. 1, Paper No. 17, 23 p. (2021). MSC: 47A06 PDFBibTeX XMLCite \textit{A. Ammar} et al., Bol. Soc. Mat. Mex., III. Ser. 27, No. 1, Paper No. 17, 23 p. (2021; Zbl 07342800) Full Text: DOI
Ferjani, Imen; Jeribi, Aref; Krichen, Bilel On relative essential spectra of a \(3 \times 3\) operator matrix involving relative generalized weak demicompactness. (English) Zbl 1498.47007 Filomat 34, No. 13, 4271-4286 (2020). MSC: 47A08 47A53 47A10 PDFBibTeX XMLCite \textit{I. Ferjani} et al., Filomat 34, No. 13, 4271--4286 (2020; Zbl 1498.47007) Full Text: DOI
Abdelmoumen, Boulbeba; Yengui, Sonia Perturbation theory, \(M\)-essential spectra of operator matrices. (English) Zbl 1500.47006 Filomat 34, No. 4, 1187-1196 (2020). MSC: 47A08 47A55 47A10 47A53 PDFBibTeX XMLCite \textit{B. Abdelmoumen} and \textit{S. Yengui}, Filomat 34, No. 4, 1187--1196 (2020; Zbl 1500.47006) Full Text: DOI
Ibrogimov, Orif O. Spectral analysis of the spin-boson Hamiltonian with two bosons for arbitrary coupling and bounded dispersion relation. (English) Zbl 1453.81026 Rev. Math. Phys. 32, No. 6, Article ID 2050015, 28 p. (2020). MSC: 81Q10 47A10 70F07 47G10 PDFBibTeX XMLCite \textit{O. O. Ibrogimov}, Rev. Math. Phys. 32, No. 6, Article ID 2050015, 28 p. (2020; Zbl 1453.81026) Full Text: DOI arXiv
Jeribi, Aref; Krichen, Bilel; Zitouni, Ali Properties of demicompact operators, essential spectra and some perturbation results for block operator matrices with applications. (English) Zbl 1455.47002 Linear Multilinear Algebra 68, No. 12, 2506-2522 (2020). MSC: 47A08 47A10 47A55 47A53 47D08 47N20 PDFBibTeX XMLCite \textit{A. Jeribi} et al., Linear Multilinear Algebra 68, No. 12, 2506--2522 (2020; Zbl 1455.47002) Full Text: DOI
Gil’, Michael On location of spectra of unbounded operators in the right half-plane. (English) Zbl 1463.47019 Afr. Mat. 31, No. 7-8, 1121-1127 (2020). MSC: 47A10 47A55 47B02 PDFBibTeX XMLCite \textit{M. Gil'}, Afr. Mat. 31, No. 7--8, 1121--1127 (2020; Zbl 1463.47019) Full Text: DOI
Shamsabadi, Mitra; Arefijamaal, Ali Akbar; Balazs, Peter The invertibility of \(U\)-fusion cross Gram matrices of operators. (English) Zbl 1454.42032 Mediterr. J. Math. 17, No. 4, Paper No. 130, 19 p. (2020). Reviewer: Anirudha Poria (Bengaluru) MSC: 42C15 47A05 PDFBibTeX XMLCite \textit{M. Shamsabadi} et al., Mediterr. J. Math. 17, No. 4, Paper No. 130, 19 p. (2020; Zbl 1454.42032) Full Text: DOI arXiv
Grubišić, Luka; Kostrykin, Vadim; Makarov, Konstantin A.; Schmitz, Stephan; Veselić, Krešimir Diagonalization of indefinite saddle point forms. (English) Zbl 1446.47002 Kurasov, Pavel (ed.) et al., Analysis as a tool in mathematical physics. In memory of Boris Pavlov. Collected papers presented at the conferences “Spectral Theory and Applications”, Stockholm, Sweden, March 13–15, 2016 and “Operator Theory, Analysis and Mathematical Physics – OTAMP2016”, Euler International Mathematical Institute, St. Petersburg, Russia, August 2–7, 2016. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 276, 373-400 (2020). MSC: 47A07 47A55 47A62 47F05 35M10 PDFBibTeX XMLCite \textit{L. Grubišić} et al., Oper. Theory: Adv. Appl. 276, 373--400 (2020; Zbl 1446.47002) Full Text: DOI arXiv
Brahim, Fatma Ben; Jeribi, Aref; Krichen, Bilel Spectral theory for polynomially demicompact operators. (English) Zbl 1496.47023 Filomat 33, No. 7, 2017-2030 (2019). MSC: 47A53 47A55 47A10 PDFBibTeX XMLCite \textit{F. B. Brahim} et al., Filomat 33, No. 7, 2017--2030 (2019; Zbl 1496.47023) Full Text: DOI
Andrei Andreevich Shkalikov (on his seventieth birthday). (English. Russian original) Zbl 1436.01047 Trans. Mosc. Math. Soc. 2019, 113-122 (2019); translation from Tr. Mosk. Mat. O.-va 80, No. 2, 133-145 (2019). MSC: 01A70 PDFBibTeX XMLCite Trans. Mosc. Math. Soc. 2019, 113--122 (2019; Zbl 1436.01047); translation from Tr. Mosk. Mat. O.-va 80, No. 2, 133--145 (2019) Full Text: DOI
Belghith, Marwa; Moalla, Nedra; Walha, Ines On the essential spectra of unbounded operator matrices with non diagonal domain and an application. (English) Zbl 1448.47009 Oper. Matrices 13, No. 1, 231-251 (2019). MSC: 47A08 47A53 34K08 PDFBibTeX XMLCite \textit{M. Belghith} et al., Oper. Matrices 13, No. 1, 231--251 (2019; Zbl 1448.47009) Full Text: DOI
Ferjani, Imen; Jeribi, Aref; Krichen, Bilel Spectral properties involving generalized weakly demicompact operators. (English) Zbl 1486.47023 Mediterr. J. Math. 16, No. 2, Paper No. 30, 21 p. (2019). MSC: 47A53 47A10 47A08 PDFBibTeX XMLCite \textit{I. Ferjani} et al., Mediterr. J. Math. 16, No. 2, Paper No. 30, 21 p. (2019; Zbl 1486.47023) Full Text: DOI
Berkani, Mohamed; Boudhief, Monia; Moalla, Nedra Stability of essential B-spectra of unbounded linear operators and applications. (English) Zbl 1413.47012 Afr. Mat. 29, No. 7-8, 1189-1202 (2018). MSC: 47A10 47A53 PDFBibTeX XMLCite \textit{M. Berkani} et al., Afr. Mat. 29, No. 7--8, 1189--1202 (2018; Zbl 1413.47012) Full Text: DOI
Brahim, Fatma Ben; Jeribi, Aref; Krichen, Bilel Polynomially demicompact operators and spectral theory for operator matrices involving demicompactness classes. (English) Zbl 06982147 Bull. Korean Math. Soc. 55, No. 5, 1351-1370 (2018). MSC: 47A53 47A55 47A10 PDFBibTeX XMLCite \textit{F. B. Brahim} et al., Bull. Korean Math. Soc. 55, No. 5, 1351--1370 (2018; Zbl 06982147) Full Text: Link
Ammar, Aymen; Jeribi, Aref; Saadaoui, Bilel A characterization of essential pseudospectra of the multivalued operator matrix. (English) Zbl 06945819 Anal. Math. Phys. 8, No. 3, 325-350 (2018). MSC: 47A06 PDFBibTeX XMLCite \textit{A. Ammar} et al., Anal. Math. Phys. 8, No. 3, 325--350 (2018; Zbl 06945819) Full Text: DOI
Engström, Christian; Torshage, Axel On equivalence and linearization of operator matrix functions with unbounded entries. (English) Zbl 1508.47019 Integral Equations Oper. Theory 89, No. 4, 465-492 (2017). MSC: 47A56 47A08 PDFBibTeX XMLCite \textit{C. Engström} and \textit{A. Torshage}, Integral Equations Oper. Theory 89, No. 4, 465--492 (2017; Zbl 1508.47019) Full Text: DOI arXiv
Ibrogimov, Orif O.; Tretter, Christiane Essential spectrum of elliptic systems of pseudo-differential operators on \(L^2(\mathbb {R}^N) \oplus L^2(\mathbb {R}^N)\). (English) Zbl 06818249 J. Pseudo-Differ. Oper. Appl. 8, No. 2, 147-166 (2017). MSC: 47G30 35S05 47A10 47A53 PDFBibTeX XMLCite \textit{O. O. Ibrogimov} and \textit{C. Tretter}, J. Pseudo-Differ. Oper. Appl. 8, No. 2, 147--166 (2017; Zbl 06818249) Full Text: DOI arXiv
Moalla, Nedra; Walha, Ines Stability of Schechter essential spectrum of \(2 \times 2\) block operator matrix by means of measure of non strict singularity and application. (English) Zbl 1508.47005 Indag. Math., New Ser. 28, No. 6, 1275-1287 (2017). MSC: 47A08 47A10 PDFBibTeX XMLCite \textit{N. Moalla} and \textit{I. Walha}, Indag. Math., New Ser. 28, No. 6, 1275--1287 (2017; Zbl 1508.47005) Full Text: DOI
Ammar, Aymen; Jeribi, Aref; Saadaoui, Bilel Frobenius-Schur factorization for multivalued \(2\times2\) matrices linear operator. (English) Zbl 1476.47004 Mediterr. J. Math. 14, No. 1, Paper No. 29, 29 p. (2017). MSC: 47A06 47A08 47A68 PDFBibTeX XMLCite \textit{A. Ammar} et al., Mediterr. J. Math. 14, No. 1, Paper No. 29, 29 p. (2017; Zbl 1476.47004) Full Text: DOI
Ibrogimov, Orif O. Essential spectrum of non-self-adjoint singular matrix differential operators. (English) Zbl 06697491 J. Math. Anal. Appl. 451, No. 1, 473-496 (2017). MSC: 47-XX 81-XX PDFBibTeX XMLCite \textit{O. O. Ibrogimov}, J. Math. Anal. Appl. 451, No. 1, 473--496 (2017; Zbl 06697491) Full Text: DOI arXiv
Engström, Christian; Langer, Heinz; Tretter, Christiane Rational eigenvalue problems and applications to photonic crystals. (English) Zbl 1351.65084 J. Math. Anal. Appl. 445, No. 1, 240-279 (2017). MSC: 65N25 35P30 65N30 35P15 82D25 PDFBibTeX XMLCite \textit{C. Engström} et al., J. Math. Anal. Appl. 445, No. 1, 240--279 (2017; Zbl 1351.65084) Full Text: DOI arXiv
Shkalikov, A. A.; Trunk, Carsten On stability of closedness and self-adjointness for \(2\times2\) operator matrices. (English. Russian original) Zbl 06701382 Math. Notes 100, No. 6, 870-875 (2016); translation from Mat. Zametki 100, No. 6, 932-938 (2016). MSC: 47-XX PDFBibTeX XMLCite \textit{A. A. Shkalikov} and \textit{C. Trunk}, Math. Notes 100, No. 6, 870--875 (2016; Zbl 06701382); translation from Mat. Zametki 100, No. 6, 932--938 (2016) Full Text: DOI
Jeribi, Aref; Krichen, Bilel; Dhahri, Mohammed Zarai Essential spectra of some matrix operators involving \(\gamma\)-relatively bounded entries and an application. (English) Zbl 1502.47005 Linear Multilinear Algebra 64, No. 8, 1654-1668 (2016). MSC: 47A08 47A10 39B42 47A55 47A53 PDFBibTeX XMLCite \textit{A. Jeribi} et al., Linear Multilinear Algebra 64, No. 8, 1654--1668 (2016; Zbl 1502.47005) Full Text: DOI
Ammar, Aymen; Diagana, Toka; Jeribi, Aref Perturbations of Fredholm linear relations in Banach spaces with application to \(3 \times 3\)-block matrices of linear relations. (English) Zbl 1331.47002 Arab J. Math. Sci. 22, No. 1, 59-76 (2016). MSC: 47A06 47A53 PDFBibTeX XMLCite \textit{A. Ammar} et al., Arab J. Math. Sci. 22, No. 1, 59--76 (2016; Zbl 1331.47002) Full Text: DOI
Ibrogimov, O. O.; Siegl, P.; Tretter, C. Analysis of the essential spectrum of singular matrix differential operators. (English) Zbl 1328.47008 J. Differ. Equations 260, No. 4, 3881-3926 (2016). MSC: 47A10 34L05 47A55 76E99 PDFBibTeX XMLCite \textit{O. O. Ibrogimov} et al., J. Differ. Equations 260, No. 4, 3881--3926 (2016; Zbl 1328.47008) Full Text: DOI arXiv
Ammar, Aymen; Dhahri, Mohammed Zerai; Jeribi, Aref Some properties of upper triangular \(3\times 3\)-block matrices of linear relations. (English) Zbl 1330.47005 Boll. Unione Mat. Ital. 8, No. 3, 189-204 (2015). MSC: 47A06 47A53 PDFBibTeX XMLCite \textit{A. Ammar} et al., Boll. Unione Mat. Ital. 8, No. 3, 189--204 (2015; Zbl 1330.47005) Full Text: DOI
Muminov, M. É.; Rasulov, T. Kh. An eigenvalue multiplicity formula for the Schur complement of a \(3\times3\) block operator matrix. (English. Russian original) Zbl 1323.47010 Sib. Math. J. 56, No. 4, 699-713 (2015); translation from Sib. Mat. Zh. 56, No. 4, 878-895 (2015). MSC: 47A56 81Q10 PDFBibTeX XMLCite \textit{M. É. Muminov} and \textit{T. Kh. Rasulov}, Sib. Math. J. 56, No. 4, 699--713 (2015; Zbl 1323.47010); translation from Sib. Mat. Zh. 56, No. 4, 878--895 (2015) Full Text: DOI
Wu, De Yu; Chen, Alatancang On the adjoint of operator matrices with unbounded entries. II. (English) Zbl 1325.47004 Acta Math. Sin., Engl. Ser. 31, No. 6, 995-1002 (2015). MSC: 47A05 PDFBibTeX XMLCite \textit{D. Y. Wu} and \textit{A. Chen}, Acta Math. Sin., Engl. Ser. 31, No. 6, 995--1002 (2015; Zbl 1325.47004) Full Text: DOI
Chen, Alatancang; Jin, GuoHai; Wu, DeYu On symplectic self-adjointness of Hamiltonian operator matrices. (English) Zbl 1319.47018 Sci. China, Math. 58, No. 4, 821-828 (2015). MSC: 47A99 47B25 47E05 PDFBibTeX XMLCite \textit{A. Chen} et al., Sci. China, Math. 58, No. 4, 821--828 (2015; Zbl 1319.47018) Full Text: DOI arXiv
Walha, Ines On the M-essential spectra of two-group transport equations. (English) Zbl 1524.47019 Math. Methods Appl. Sci. 37, No. 14, 2135-2149 (2014). MSC: 47A56 47A08 47B01 47A10 47A53 47A55 PDFBibTeX XMLCite \textit{I. Walha}, Math. Methods Appl. Sci. 37, No. 14, 2135--2149 (2014; Zbl 1524.47019) Full Text: DOI
Strauss, Michael A new approach to spectral approximation. (English) Zbl 1524.47020 J. Funct. Anal. 267, No. 8, 3084-3103 (2014). MSC: 47A58 47A75 65J10 PDFBibTeX XMLCite \textit{M. Strauss}, J. Funct. Anal. 267, No. 8, 3084--3103 (2014; Zbl 1524.47020) Full Text: DOI arXiv
Álvarez, Teresa; Ammar, Aymen; Jeribi, Aref On the essential spectra of some matrix of linear relations. (English) Zbl 1331.47001 Math. Methods Appl. Sci. 37, No. 5, 620-644 (2014). Reviewer: Maryam Khosravi (Kerman) MSC: 47A06 47A55 47A25 PDFBibTeX XMLCite \textit{T. Álvarez} et al., Math. Methods Appl. Sci. 37, No. 5, 620--644 (2014; Zbl 1331.47001) Full Text: DOI
Charfi, Salma; Jeribi, Aref; Moalla, Rihab Essential spectra of operator matrices and applications. (English) Zbl 1304.47003 Math. Methods Appl. Sci. 37, No. 4, 597-608 (2014). Reviewer: Janko Bračič (Ljubljana) MSC: 47A10 PDFBibTeX XMLCite \textit{S. Charfi} et al., Math. Methods Appl. Sci. 37, No. 4, 597--608 (2014; Zbl 1304.47003) Full Text: DOI
Qi, Jiangang; Chen, Shaozhu Essential spectra of one-dimensional Dirac operators. (English) Zbl 1269.34093 Integral Equations Oper. Theory 74, No. 1, 7-24 (2012). Reviewer: Roger A. Nichols (Chattanooga) MSC: 34L40 34L05 34B20 PDFBibTeX XMLCite \textit{J. Qi} and \textit{S. Chen}, Integral Equations Oper. Theory 74, No. 1, 7--24 (2012; Zbl 1269.34093) Full Text: DOI
Boulton, Lyonell; Boussaïd, Nabile; Lewin, Mathieu Generalized Weyl theorems and spectral pollution in the Galerkin method. (English) Zbl 1260.35086 J. Spectr. Theory 2, No. 4, 329-354 (2012). MSC: 35P15 47A10 65N25 PDFBibTeX XMLCite \textit{L. Boulton} et al., J. Spectr. Theory 2, No. 4, 329--354 (2012; Zbl 1260.35086) Full Text: DOI arXiv
Boulton, Lyonell; Strauss, Michael Eigenvalue enclosures and convergence for the linearized MHD operator. (English) Zbl 1254.76170 BIT 52, No. 4, 801-825 (2012). MSC: 76W05 PDFBibTeX XMLCite \textit{L. Boulton} and \textit{M. Strauss}, BIT 52, No. 4, 801--825 (2012; Zbl 1254.76170) Full Text: DOI arXiv
Pribyl, M. Analysis of spectral properties of operators for linearized steady-state equations of a viscous compressible heat-conducting fluid. (English) Zbl 1221.35259 J. Dyn. Control Syst. 17, No. 2, 187-205 (2011). MSC: 35P05 35S05 47A10 35A24 PDFBibTeX XMLCite \textit{M. Pribyl}, J. Dyn. Control Syst. 17, No. 2, 187--205 (2011; Zbl 1221.35259) Full Text: DOI
Qi, Jiangang; Chen, Shaozhu Essential spectra of singular matrix differential operators of mixed order. (English) Zbl 1233.34035 J. Differ. Equations 250, No. 12, 4219-4235 (2011). Reviewer: Manfred Möller (Johannesburg) MSC: 34L05 34B20 34L40 PDFBibTeX XMLCite \textit{J. Qi} and \textit{S. Chen}, J. Differ. Equations 250, No. 12, 4219--4235 (2011; Zbl 1233.34035) Full Text: DOI
Qi, Jiangang; Chen, Shaozhu Essential spectra of singular matrix differential operators of mixed order in the limit circle case. (English) Zbl 1223.34118 Math. Nachr. 284, No. 2-3, 342-354 (2011). Reviewer: Manfred Möller (Johannesburg) MSC: 34L05 34B20 34L40 PDFBibTeX XMLCite \textit{J. Qi} and \textit{S. Chen}, Math. Nachr. 284, No. 2--3, 342--354 (2011; Zbl 1223.34118) Full Text: DOI
Jeribi, Aref; Walha, Ines Gustafson, Weidmann, Kato, Wolf, Schechter and Browder essential spectra of some matrix operator and application to two-group transport equation. (English) Zbl 1217.15013 Math. Nachr. 284, No. 1, 67-86 (2011). Reviewer: Jaspal Singh Aujla (Jalandhar) MSC: 15A18 47A10 47A53 PDFBibTeX XMLCite \textit{A. Jeribi} and \textit{I. Walha}, Math. Nachr. 284, No. 1, 67--86 (2011; Zbl 1217.15013) Full Text: DOI
Wu, Deyu; Chen, Alatancang Invertibility of nonnegative Hamiltonian operator with unbounded entries. (English) Zbl 1202.47046 J. Math. Anal. Appl. 373, No. 2, 410-413 (2011). MSC: 47B99 47A05 47B25 37K99 PDFBibTeX XMLCite \textit{D. Wu} and \textit{A. Chen}, J. Math. Anal. Appl. 373, No. 2, 410--413 (2011; Zbl 1202.47046) Full Text: DOI
Amar, Afif Ben; Jeribi, Aref; Krichen, Bilel Essential spectra of a \(3 \times 3\) operator matrix and an application to three-group transport equations. (English) Zbl 1198.47004 Integral Equations Oper. Theory 68, No. 1, 1-21 (2010). MSC: 47A05 47A55 47A53 47A10 PDFBibTeX XMLCite \textit{A. B. Amar} et al., Integral Equations Oper. Theory 68, No. 1, 1--21 (2010; Zbl 1198.47004) Full Text: DOI
Ben Ali, Naouel; Jeribi, Aref; Moalla, Nedra On some subsets of Schechter’s essential spectrum of a matrix operator and application to transport operator. (English) Zbl 1239.47003 Math. Nachr. 283, No. 9, 1245-1256 (2010). Reviewer: Mohamed Zohry (Tétouan) MSC: 47A10 47A53 PDFBibTeX XMLCite \textit{N. Ben Ali} et al., Math. Nachr. 283, No. 9, 1245--1256 (2010; Zbl 1239.47003) Full Text: DOI
Strauss, Michael Spectral estimates and basis properties for self-adjoint block operator matrices. (English) Zbl 1202.47025 Integral Equations Oper. Theory 67, No. 2, 257-277 (2010). MSC: 47B25 34L15 47A10 47A11 47A15 76W05 PDFBibTeX XMLCite \textit{M. Strauss}, Integral Equations Oper. Theory 67, No. 2, 257--277 (2010; Zbl 1202.47025) Full Text: DOI arXiv
Charfi, Salma; Jeribi, Aref On a characterization of the essential spectra of some matrix operators and application to two-group transport operators. (English) Zbl 1172.47013 Math. Z. 262, No. 4, 775-794 (2009). Reviewer: Alexei Yu. Karlovich (Lisboa) MSC: 47A53 35R10 47N20 PDFBibTeX XMLCite \textit{S. Charfi} and \textit{A. Jeribi}, Math. Z. 262, No. 4, 775--794 (2009; Zbl 1172.47013) Full Text: DOI
Brown, B. M.; Grubb, G.; Wood, I. G. \(M\)-functions for closed extensions of adjoint pairs of operators with applications to elliptic boundary problems. (English) Zbl 1167.47057 Math. Nachr. 282, No. 3, 314-347 (2009). Reviewer: Viorel Iftimie (Bucureşti) MSC: 47N20 35J25 35J30 35J55 35P05 47A10 47A11 PDFBibTeX XMLCite \textit{B. M. Brown} et al., Math. Nachr. 282, No. 3, 314--347 (2009; Zbl 1167.47057) Full Text: DOI arXiv
Jeribi, Aref; Moalla, Nedra; Walha, Ines Spectra of some block operator matrices and application to transport operators. (English) Zbl 1166.47007 J. Math. Anal. Appl. 351, No. 1, 315-325 (2009). Reviewer: Ti-Jun Xiao (Fudan) MSC: 47A10 PDFBibTeX XMLCite \textit{A. Jeribi} et al., J. Math. Anal. Appl. 351, No. 1, 315--325 (2009; Zbl 1166.47007) Full Text: DOI
Winklmeier, Monika A variational principle for block operator matrices and its application to the angular part of the Dirac operator in curved spacetime. (English) Zbl 1155.35063 J. Differ. Equations 245, No. 8, 2145-2175 (2008). Reviewer: Sylvain Golenia (Erlangen) MSC: 35P15 34L40 58E30 PDFBibTeX XMLCite \textit{M. Winklmeier}, J. Differ. Equations 245, No. 8, 2145--2175 (2008; Zbl 1155.35063) Full Text: DOI arXiv
Albeverio, Sergio; Konstantinov, Alexei On the absolutely continuous spectrum of block operator matrices. (English) Zbl 1152.47003 Math. Nachr. 281, No. 8, 1079-1087 (2008). Reviewer: Jussi Behrndt (Berlin) MSC: 47A10 47A40 47A55 PDFBibTeX XMLCite \textit{S. Albeverio} and \textit{A. Konstantinov}, Math. Nachr. 281, No. 8, 1079--1087 (2008; Zbl 1152.47003) Full Text: DOI
Gal, Ciprian G.; Gal, Nadia J. A spectral approach to ill-posed problems for wave equations. (English) Zbl 1164.35053 Ann. Mat. Pura Appl. (4) 187, No. 4, 705-717 (2008). Reviewer: Gheorghe Aniculăesei (Iaşi) MSC: 35L20 PDFBibTeX XMLCite \textit{C. G. Gal} and \textit{N. J. Gal}, Ann. Mat. Pura Appl. (4) 187, No. 4, 705--717 (2008; Zbl 1164.35053) Full Text: DOI
Möller, Manfred; Szafraniec, Franciszek Hugon Adjoints and formal adjoints of matrices of unbounded operators. (English) Zbl 1153.47002 Proc. Am. Math. Soc. 136, No. 6, 2165-2176 (2008). Reviewer: Khristo N. Boyadzhiev (Ada) MSC: 47A05 47D06 PDFBibTeX XMLCite \textit{M. Möller} and \textit{F. H. Szafraniec}, Proc. Am. Math. Soc. 136, No. 6, 2165--2176 (2008; Zbl 1153.47002) Full Text: DOI arXiv
Marletta, Marco; Tretter, Christiane Essential spectra of coupled systems of differential equations and applications in hydrodynamics. (English) Zbl 1129.47061 J. Differ. Equations 243, No. 1, 36-69 (2007). MSC: 47N20 47E05 47A10 34L05 47A55 76E99 PDFBibTeX XMLCite \textit{M. Marletta} and \textit{C. Tretter}, J. Differ. Equations 243, No. 1, 36--69 (2007; Zbl 1129.47061) Full Text: DOI
Shkalikov, A. A. Dissipative operators in a Krein space. Invariant subspaces and properties of restrictions. (English. Russian original) Zbl 1255.47045 Funct. Anal. Appl. 41, No. 2, 154-167 (2007); translation from Funkts. Anal. Prilozh. 41, No. 2, 93-110 (2007). MSC: 47B50 47A15 47B44 PDFBibTeX XMLCite \textit{A. A. Shkalikov}, Funct. Anal. Appl. 41, No. 2, 154--167 (2007; Zbl 1255.47045); translation from Funkts. Anal. Prilozh. 41, No. 2, 93--110 (2007) Full Text: DOI arXiv
Koné, Siaka; Möller, Manfred Mixed order systems of ordinary linear differential equations. (English) Zbl 1143.34055 Rocky Mt. J. Math. 36, No. 3, 957-980 (2006). Reviewer: Zoran Kadelburg (Beograd) MSC: 34L10 34B05 PDFBibTeX XMLCite \textit{S. Koné} and \textit{M. Möller}, Rocky Mt. J. Math. 36, No. 3, 957--980 (2006; Zbl 1143.34055) Full Text: DOI Euclid
Moalla, Nedra; Damak, Mondher; Jeribi, Aref Essential spectra of some matrix operators and application to two-group transport operators with general boundary conditions. (English) Zbl 1108.47014 J. Math. Anal. Appl. 323, No. 2, 1071-1090 (2006). Reviewer: Alexei Yu. Karlovich (Braga) MSC: 47A53 35R10 47N20 PDFBibTeX XMLCite \textit{N. Moalla} et al., J. Math. Anal. Appl. 323, No. 2, 1071--1090 (2006; Zbl 1108.47014) Full Text: DOI
Kopachevsky, N. D.; Mennicken, R.; Pashkova, Ju. S.; Tretter, C. Complete second order linear differential operator equations in Hilbert space and applications in hydrodynamics. (English) Zbl 1053.34059 Trans. Am. Math. Soc. 356, No. 12, 4737-4766 (2004). Reviewer: A. A. Tolstonogov (Irkutsk) MSC: 34G20 35A05 35Q30 47N20 76D05 PDFBibTeX XMLCite \textit{N. D. Kopachevsky} et al., Trans. Am. Math. Soc. 356, No. 12, 4737--4766 (2004; Zbl 1053.34059) Full Text: DOI
Kraus, Margarita; Langer, Matthias; Tretter, Christiane Variational principles and eigenvalue estimates for unbounded block operator matrices and applications. (English) Zbl 1066.49030 J. Comput. Appl. Math. 171, No. 1-2, 311-334 (2004). Reviewer: Bilender P. Allahverdiev (Isparta) MSC: 49R50 34L15 34L20 76W05 58J50 47A75 PDFBibTeX XMLCite \textit{M. Kraus} et al., J. Comput. Appl. Math. 171, No. 1--2, 311--334 (2004; Zbl 1066.49030) Full Text: DOI
Lutgen, J. On essential spectra of operator-matrices and their Feshbach maps. (English) Zbl 1067.47020 J. Math. Anal. Appl. 289, No. 2, 419-430 (2004). Reviewer: Andras Batkai (Roma) MSC: 47A56 47A10 PDFBibTeX XMLCite \textit{J. Lutgen}, J. Math. Anal. Appl. 289, No. 2, 419--430 (2004; Zbl 1067.47020) Full Text: DOI
Kurasov, Pavel; Naboko, Serguei Essential spectrum due to singularity. (English) Zbl 1362.34124 J. Nonlinear Math. Phys. 10, Suppl. 1, 93-106 (2003). MSC: 34L05 34L40 PDFBibTeX XMLCite \textit{P. Kurasov} and \textit{S. Naboko}, J. Nonlinear Math. Phys. 10, 93--106 (2003; Zbl 1362.34124) Full Text: DOI
Konstantinov, Alexei; Mennicken, Reinhard On the Friedrichs extension of some block operator matrices. (English) Zbl 1056.47021 Integral Equations Oper. Theory 42, No. 4, 472-481 (2002). Reviewer: Michael Perelmuter (Kyïv) MSC: 47B25 47A10 34L05 PDFBibTeX XMLCite \textit{A. Konstantinov} and \textit{R. Mennicken}, Integral Equations Oper. Theory 42, No. 4, 472--481 (2002; Zbl 1056.47021) Full Text: DOI
Adamjan, Vadim; Langer, Heinz; Langer, Matthias A spectral theory for a \(\lambda\)-rational Sturm-Liouville problem. (English) Zbl 1025.34024 J. Differ. Equations 171, No. 2, 315-345 (2001). Reviewer: Hubert Kalf (München) MSC: 34B24 34L10 78A25 82D40 34B20 PDFBibTeX XMLCite \textit{V. Adamjan} et al., J. Differ. Equations 171, No. 2, 315--345 (2001; Zbl 1025.34024) Full Text: DOI
Faierman, M.; Fries, R. J.; Mennicken, R.; Möller, M. On the essential spectrum of the linearized Navier-Stokes operator. (English) Zbl 0970.35093 Integral Equations Oper. Theory 38, No. 1, 9-27 (2000). Reviewer: Vladimir Mityushev (Paris) MSC: 35Q30 35P05 35G15 35J45 47F05 PDFBibTeX XMLCite \textit{M. Faierman} et al., Integral Equations Oper. Theory 38, No. 1, 9--27 (2000; Zbl 0970.35093) Full Text: DOI
Faierman, Melvin; Mennicken, Reinhard; Möller, Manfred The essential spectrum of a system of singular ordinary differential operators of mixed order. I: The general problem and an almost regular case. (English) Zbl 0948.34057 Math. Nachr. 208, 101-115 (1999). Reviewer: Tuncay Aktosun (Fargo) MSC: 34L05 76W05 34B05 47E05 34A30 PDFBibTeX XMLCite \textit{M. Faierman} et al., Math. Nachr. 208, 101--115 (1999; Zbl 0948.34057) Full Text: DOI
Hardt, Volker; Mennicken, Reinhard; Naboko, Serguei Systems of singular differential operators of mixed order and applications to 1-dimensional MHD problems. (English) Zbl 0940.47002 Math. Nachr. 205, 19-68 (1999). Reviewer: W.D.Evans (Cardiff) MSC: 47A10 47B25 76W05 47E05 PDFBibTeX XMLCite \textit{V. Hardt} et al., Math. Nachr. 205, 19--68 (1999; Zbl 0940.47002) Full Text: DOI
Ammar-Khodja, Farid; Bader, Ahmed; Benabdallah, Assia Dynamic stabilization of systems via decoupling techniques. (English) Zbl 0941.74014 ESAIM, Control Optim. Calc. Var. 4, 577-593 (1999). MSC: 74F05 35Q72 35B35 PDFBibTeX XMLCite \textit{F. Ammar-Khodja} et al., ESAIM, Control Optim. Calc. Var. 4, 577--593 (1999; Zbl 0941.74014) Full Text: DOI EuDML
Konstantinov, A. Yu. Spectral analysis of differential operators of mixed order. (English) Zbl 0917.47042 ZAMM, Z. Angew. Math. Mech. 78, Suppl. 3, S977-S978 (1998). MSC: 47F05 47A40 47B25 PDFBibTeX XMLCite \textit{A. Yu. Konstantinov}, ZAMM, Z. Angew. Math. Mech. 78, S977--S978 (1998; Zbl 0917.47042) Full Text: DOI
Möller, Manfred On the essential spectrum of a class of operators in Hilbert space. (English) Zbl 0919.47004 Math. Nachr. 194, 185-196 (1998). MSC: 47A10 47A53 PDFBibTeX XMLCite \textit{M. Möller}, Math. Nachr. 194, 185--196 (1998; Zbl 0919.47004) Full Text: DOI
Belyaev, V. B.; Motovilov, A. K. Perturbation of an embedded eigenvalue by a nearby resonance. (English. Russian original) Zbl 0964.81525 Theor. Math. Phys. 111, No. 1, 454-466 (1997); translation from Teor. Mat. Fiz. 111, No. 1, 77-93 (1997). MSC: 81U99 81V55 PDFBibTeX XMLCite \textit{V. B. Belyaev} and \textit{A. K. Motovilov}, Theor. Math. Phys. 111, No. 1, 454--466 (1997; Zbl 0964.81525); translation from Teor. Mat. Fiz. 111, No. 1, 77--93 (1997) Full Text: DOI arXiv
Kurasov, P. Energy dependent boundary conditions and the few-body scattering problem. (English) Zbl 0896.70005 Rev. Math. Phys. 9, No. 7, 853-906 (1997). MSC: 70-XX 81U10 PDFBibTeX XMLCite \textit{P. Kurasov}, Rev. Math. Phys. 9, No. 7, 853--906 (1997; Zbl 0896.70005) Full Text: DOI
Raikov, George D. The essential spectrum of a linear magnetohydrodynamic model containing a vacuum region. (English) Zbl 0881.35092 Commun. Partial Differ. Equations 22, No. 1-2, 71-97 (1997). Reviewer: G.E.Karadzhov (Sofia) MSC: 35Q35 35P05 76W05 PDFBibTeX XMLCite \textit{G. D. Raikov}, Commun. Partial Differ. Equations 22, No. 1--2, 71--97 (1997; Zbl 0881.35092) Full Text: DOI
Shkalikov, A. A. On the essential spectrum of matrix operators. (English. Russian original) Zbl 0871.47005 Math. Notes 58, No. 6, 1359-1362 (1995); translation from Mat. Zametki 58, No. 6, 945-949 (1995). Reviewer: Hou Jinchuan (Linfen / Shanxi) MSC: 47A10 47B37 47A05 PDFBibTeX XMLCite \textit{A. A. Shkalikov}, Math. Notes 58, No. 6, 1359--1362 (1995; Zbl 0871.47005); translation from Mat. Zametki 58, No. 6, 945--949 (1995) Full Text: DOI