Zaeim, A.; Jafari, M.; Kafimoosavi, R. On some curvature functionals over homogeneous Siklos space-times. (English) Zbl 07780066 J. Linear Topol. Algebra 12, No. 2, 105-112 (2023). MSC: 58E11 53B30 53C30 PDFBibTeX XMLCite \textit{A. Zaeim} et al., J. Linear Topol. Algebra 12, No. 2, 105--112 (2023; Zbl 07780066) Full Text: DOI
Atashpeykar, Parvane; Zaeim, Amirhesam; Haji-Badali, Ali Weakly-Einstein conditions over locally conformally flat Lorentzian three-manifolds. (English) Zbl 07770244 Rep. Math. Phys. 91, No. 2, 183-198 (2023). MSC: 58E11 53B30 53C50 PDFBibTeX XMLCite \textit{P. Atashpeykar} et al., Rep. Math. Phys. 91, No. 2, 183--198 (2023; Zbl 07770244) Full Text: DOI
Zaeim, Amirhesam; Aryanejad, Yadollah; Gheitasi, Mokhtar On conformal geometry of four-dimensional generalized symmetric spaces. (English) Zbl 1528.53035 Rev. Unión Mat. Argent. 65, No. 1, 135-153 (2023). MSC: 53C18 53C35 PDFBibTeX XMLCite \textit{A. Zaeim} et al., Rev. Unión Mat. Argent. 65, No. 1, 135--153 (2023; Zbl 1528.53035) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Critical metrics for quadratic curvature functionals on some solvmanifolds. (English) Zbl 1523.53064 Rev. Mat. Complut. 36, No. 3, 869-886 (2023). MSC: 53C50 53C21 35A01 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Rev. Mat. Complut. 36, No. 3, 869--886 (2023; Zbl 1523.53064) Full Text: DOI
Zaeim, Amirhesam; Ghadimi, Fatemeh; Chaichi, Mohammad On self-duality and anti-self-duality of four-dimensional neutral Lie groups. (English) Zbl 07802676 Int. J. Geom. Methods Mod. Phys. 19, No. 13, Article ID 2250207, 32 p. (2022). MSC: 53C30 22E46 53C50 PDFBibTeX XMLCite \textit{A. Zaeim} et al., Int. J. Geom. Methods Mod. Phys. 19, No. 13, Article ID 2250207, 32 p. (2022; Zbl 07802676) Full Text: DOI
Calvaruso, Giovanni; Kaflou, Mahdieh; Zaeim, Amirhesam On the symmetries of Siklos spacetimes. (English) Zbl 1500.83036 Gen. Relativ. Gravitation 54, No. 6, Paper No. 60, 26 p. (2022). MSC: 83F05 53C50 53B30 53C21 PDFBibTeX XMLCite \textit{G. Calvaruso} et al., Gen. Relativ. Gravitation 54, No. 6, Paper No. 60, 26 p. (2022; Zbl 1500.83036) Full Text: DOI
Bastami, Milad; Zaeim, Amirhesam; Haji-Badali, Ali On Lie groups with recurrent curvature in dimension four. (English) Zbl 1497.53116 Bull. Iran. Math. Soc. 48, No. 3, 1037-1049 (2022). MSC: 53C50 53C30 53C25 PDFBibTeX XMLCite \textit{M. Bastami} et al., Bull. Iran. Math. Soc. 48, No. 3, 1037--1049 (2022; Zbl 1497.53116) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Conformal geometry of semi-direct extensions of the Heisenberg group. (English) Zbl 1498.53075 J. Math. Phys. Anal. Geom. 17, No. 4, 407-421 (2021). Reviewer: Andreas Arvanitoyeorgos (Patras) MSC: 53C30 53C20 53C50 53C18 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, J. Math. Phys. Anal. Geom. 17, No. 4, 407--421 (2021; Zbl 1498.53075) Full Text: DOI
Bastami, Milad; Haji-Badali, Ali; Zaeim, Amirhesam Recurrent curvature over four-dimensional homogeneous manifolds. (English) Zbl 1478.53114 Rev. Unión Mat. Argent. 62, No. 1, 243-255 (2021). MSC: 53C50 53C30 PDFBibTeX XMLCite \textit{M. Bastami} et al., Rev. Unión Mat. Argent. 62, No. 1, 243--255 (2021; Zbl 1478.53114) Full Text: DOI
Tohidfar, Atefeh; Zaeim, Amirhesam On pseudo-Riemannian cyclic homogeneous manifolds of dimension four. (English) Zbl 1464.53073 J. Lie Theory 31, No. 1, 169-187 (2021). MSC: 53C30 53B30 22E25 22E46 PDFBibTeX XMLCite \textit{A. Tohidfar} and \textit{A. Zaeim}, J. Lie Theory 31, No. 1, 169--187 (2021; Zbl 1464.53073) Full Text: Link
Calvaruso, Giovanni; Zaeim, Amirhesam Homogeneous geodesics and natural reductivity of homogeneous Gödel-type spacetimes. (English) Zbl 1457.53038 J. Geom. Phys. 159, Article ID 103919, 12 p. (2021). Reviewer: Andreas Arvanitoyeorgos (Patras) MSC: 53C30 53C50 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, J. Geom. Phys. 159, Article ID 103919, 12 p. (2021; Zbl 1457.53038) Full Text: DOI
Zaeim, Amirhesam; Jafari, Mehdi; Yaghoubi, Maryam Harmonic metrics on Gödel-type spacetimes. (English) Zbl 07809135 Int. J. Geom. Methods Mod. Phys. 17, No. 6, Article ID 2050092, 16 p. (2020). MSC: 53C30 53C43 53B30 PDFBibTeX XMLCite \textit{A. Zaeim} et al., Int. J. Geom. Methods Mod. Phys. 17, No. 6, Article ID 2050092, 16 p. (2020; Zbl 07809135) Full Text: DOI
Haji-Badali, Ali; Zaeim, Amirhesam Semi-symmetric four dimensional neutral Lie groups. (English) Zbl 1524.53139 Czech. Math. J. 70, No. 2, 393-410 (2020). Reviewer: Gabriela Paola Ovando (Rosario) MSC: 53C35 53C30 53C20 53E20 53C25 22E05 PDFBibTeX XMLCite \textit{A. Haji-Badali} and \textit{A. Zaeim}, Czech. Math. J. 70, No. 2, 393--410 (2020; Zbl 1524.53139) Full Text: DOI
Zaeim, Amirhesam; Karami, Ramisa Geometric consequences of four dimensional neutral Lie groups. (English) Zbl 1431.53074 Bull. Braz. Math. Soc. (N.S.) 50, No. 1, 167-186 (2019). Reviewer: Marco Modugno (Firenze) MSC: 53C50 53C30 53C35 PDFBibTeX XMLCite \textit{A. Zaeim} and \textit{R. Karami}, Bull. Braz. Math. Soc. (N.S.) 50, No. 1, 167--186 (2019; Zbl 1431.53074) Full Text: DOI
Karami, R.; Zaeim, A.; Haji-Badali, A. Ricci solitons and geometry of four dimensional Einstein-like neutral Lie groups. (English) Zbl 1438.53112 Period. Math. Hung. 78, No. 1, 58-78 (2019). MSC: 53C50 53C30 53C25 PDFBibTeX XMLCite \textit{R. Karami} et al., Period. Math. Hung. 78, No. 1, 58--78 (2019; Zbl 1438.53112) Full Text: DOI
Zaeim, Amirhesam; Atashpeykar, Parvane Harmonic metrics on four dimensional non-reductive homogeneous manifolds. (English) Zbl 1488.53192 Czech. Math. J. 68, No. 2, 475-490 (2018). Reviewer: Vladimir Balan (Bucureşti) MSC: 53C43 53C55 53C30 PDFBibTeX XMLCite \textit{A. Zaeim} and \textit{P. Atashpeykar}, Czech. Math. J. 68, No. 2, 475--490 (2018; Zbl 1488.53192) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Four-dimensional pseudo-Riemannian g.o. spaces and manifolds. (English) Zbl 1454.53025 J. Geom. Phys. 130, 63-80 (2018). MSC: 53C10 53C30 53C50 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, J. Geom. Phys. 130, 63--80 (2018; Zbl 1454.53025) Full Text: DOI
Zaeim, Amirhesam Einstein-like Lorentzian Lie groups of dimension four. (English) Zbl 1420.53078 J. Nonlinear Math. Phys. 24, No. 4, 556-570 (2017). MSC: 53C50 53C15 53C25 PDFBibTeX XMLCite \textit{A. Zaeim}, J. Nonlinear Math. Phys. 24, No. 4, 556--570 (2017; Zbl 1420.53078) Full Text: DOI
Zaeim, Amirhesam; Chaichi, Mohammad; Aryanejad, Yadollah On Lorentzian two-symmetric manifolds of dimension-four. (English) Zbl 1378.53083 Iran. J. Math. Sci. Inform. 12, No. 1, 81-94 (2017). MSC: 53C50 53C15 53C25 PDFBibTeX XMLCite \textit{A. Zaeim} et al., Iran. J. Math. Sci. Inform. 12, No. 1, 81--94 (2017; Zbl 1378.53083) Full Text: DOI arXiv
Calvaruso, Giovanni; Zaeim, Amirhesam On the symmetries of the Lorentzian oscillator group. (English) Zbl 1365.53062 Collect. Math. 68, No. 1, 51-67 (2017). MSC: 53C50 53B30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Collect. Math. 68, No. 1, 51--67 (2017; Zbl 1365.53062) Full Text: DOI
Batat, Wafaa; Zaeim, Amirhesam On symmetries of the Heisenberg group. arXiv:1710.04539 Preprint, arXiv:1710.04539 [math.DG] (2017). MSC: 53C50 53B30 BibTeX Cite \textit{W. Batat} and \textit{A. Zaeim}, ``On symmetries of the Heisenberg group'', Preprint, arXiv:1710.04539 [math.DG] (2017) Full Text: arXiv OA License
Zaeim, Amirhesam; Haji-Badali, Ali Einstein-like pseudo-Riemannian homogeneous manifolds of dimension four. (English) Zbl 1356.53069 Mediterr. J. Math. 13, No. 5, 3455-3468 (2016). Reviewer: Gabor Etesi (Budapest) MSC: 53C50 53C30 PDFBibTeX XMLCite \textit{A. Zaeim} and \textit{A. Haji-Badali}, Mediterr. J. Math. 13, No. 5, 3455--3468 (2016; Zbl 1356.53069) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Symmetries of Lorentzian three-manifolds with recurrent curvature. (English) Zbl 1353.53072 SIGMA, Symmetry Integrability Geom. Methods Appl. 12, Paper 063, 12 p. (2016). Reviewer: Radu Iordănescu (Bucureşti) MSC: 53C50 53B30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, SIGMA, Symmetry Integrability Geom. Methods Appl. 12, Paper 063, 12 p. (2016; Zbl 1353.53072) Full Text: DOI arXiv
Calvaruso, Giovanni; Zaeim, Amirhesam Neutral metrics on four-dimensional Lie groups. (English) Zbl 1343.53071 J. Lie Theory 25, No. 4, 1023-1044 (2015). Reviewer: Marco Modugno (Firenze) MSC: 53C50 53C15 53C25 53C30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, J. Lie Theory 25, No. 4, 1023--1044 (2015; Zbl 1343.53071) Full Text: Link
Haji-Badali, Ali; Zaeim, Amirhesam Commutative curvature operators over four-dimensional homogeneous manifolds. (English) Zbl 1332.53089 Int. J. Geom. Methods Mod. Phys. 12, No. 10, Article ID 1550123, 17 p. (2015). Reviewer: Gabor Etesi (Budapest) MSC: 53C50 53C30 53C15 PDFBibTeX XMLCite \textit{A. Haji-Badali} and \textit{A. Zaeim}, Int. J. Geom. Methods Mod. Phys. 12, No. 10, Article ID 1550123, 17 p. (2015; Zbl 1332.53089) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Invariant symmetries on non-reductive homogeneous pseudo-Riemannian four-manifolds. (English) Zbl 1326.53095 Rev. Mat. Complut. 28, No. 3, 599-622 (2015). Reviewer: Constantin Călin (Iaşi) MSC: 53C50 53B30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Rev. Mat. Complut. 28, No. 3, 599--622 (2015; Zbl 1326.53095) Full Text: DOI
Calvaruso, Giovanni; Fino, Anna; Zaeim, Amirhesam Homogeneous geodesics of non-reductive homogeneous pseudo-Riemannian 4-manifolds. (English) Zbl 1318.53048 Bull. Braz. Math. Soc. (N.S.) 46, No. 1, 23-64 (2015). Reviewer: V. Gorbatsevich (Moskva) MSC: 53C30 53C50 53C22 53C29 PDFBibTeX XMLCite \textit{G. Calvaruso} et al., Bull. Braz. Math. Soc. (N.S.) 46, No. 1, 23--64 (2015; Zbl 1318.53048) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Four-dimensional homogeneous Lorentzian manifolds. (English) Zbl 1301.53068 Monatsh. Math. 174, No. 3, 377-402 (2014). Reviewer: Azniv Kasparian (Sofia) MSC: 53C50 53C15 53C25 53C30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Monatsh. Math. 174, No. 3, 377--402 (2014; Zbl 1301.53068) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Geometric structures over non-reductive homogeneous 4-spaces. (English) Zbl 1298.53072 Adv. Geom. 14, No. 2, 191-214 (2014). Reviewer: Dmitri Alekseevsky (Moscow) MSC: 53C50 53C15 53C25 53C30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Adv. Geom. 14, No. 2, 191--214 (2014; Zbl 1298.53072) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Conformally flat homogeneous pseudo-Riemannian four-manifolds. (English) Zbl 1296.53136 Tohoku Math. J. (2) 66, No. 1, 31-54 (2014). Reviewer: Uday Chand De (Kolkata) MSC: 53C50 53C15 53C25 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Tôhoku Math. J. (2) 66, No. 1, 31--54 (2014; Zbl 1296.53136) Full Text: DOI Euclid
Calvaruso, Giovanni; Zaeim, Amirhesam A complete classification of Ricci and Yamabe solitons of non-reductive homogeneous 4-spaces. (English) Zbl 1286.53046 J. Geom. Phys. 80, 15-25 (2014). MSC: 53C21 53C50 53C25 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, J. Geom. Phys. 80, 15--25 (2014; Zbl 1286.53046) Full Text: DOI
Chaichi, Mohammad; Zaeim, Amirhesam Locally homogeneous four-dimensional manifolds of signature \((2,2)\). (English) Zbl 1287.53040 Math. Phys. Anal. Geom. 16, No. 4, 345-361 (2013). Reviewer: Zdeněk Dušek (Hradec Kralove) MSC: 53C30 53C50 PDFBibTeX XMLCite \textit{M. Chaichi} and \textit{A. Zaeim}, Math. Phys. Anal. Geom. 16, No. 4, 345--361 (2013; Zbl 1287.53040) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Four-dimensional Lorentzian Lie groups. (English) Zbl 1284.53067 Differ. Geom. Appl. 31, No. 4, 496-509 (2013). Reviewer: V. Gorbatsevich (Moskva) MSC: 53C50 53C25 53C15 53C30 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Differ. Geom. Appl. 31, No. 4, 496--509 (2013; Zbl 1284.53067) Full Text: DOI
Calvaruso, Giovanni; Zaeim, Amirhesam Geometric structures over four-dimensional generalized symmetric spaces. (English) Zbl 1283.53033 Mediterr. J. Math. 10, No. 2, 971-987 (2013). Reviewer: Zdeněk Dušek (Hradec Kralove) MSC: 53C15 53C50 53C25 PDFBibTeX XMLCite \textit{G. Calvaruso} and \textit{A. Zaeim}, Mediterr. J. Math. 10, No. 2, 971--987 (2013; Zbl 1283.53033) Full Text: DOI
Ardakani, Abbas Bahaodini; Zaeim, Amir Hesam Homogeneous structures on special classes of space-times. (English) Zbl 1307.53055 Int. J. Nonlinear Sci. 14, No. 1, 95-99 (2012). MSC: 53C50 53C30 PDFBibTeX XMLCite \textit{A. B. Ardakani} and \textit{A. H. Zaeim}, Int. J. Nonlinear Sci. 14, No. 1, 95--99 (2012; Zbl 1307.53055)