Ackermann, Nils; Weth, Tobias Unstable normalized standing waves for the space periodic NLS. (English) Zbl 1405.35191 Anal. PDE 12, No. 5, 1177-1213 (2019). MSC: 35Q55 35J91 35J20 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{T. Weth}, Anal. PDE 12, No. 5, 1177--1213 (2019; Zbl 1405.35191) Full Text: DOI arXiv OpenURL
Ackermann, Nils Uniform continuity and Brézis-Lieb-type splitting for superposition operators in Sobolev space. (English) Zbl 06992610 Adv. Nonlinear Anal. 7, No. 4, 587-599 (2018). MSC: 47H30 58E40 PDF BibTeX XML Cite \textit{N. Ackermann}, Adv. Nonlinear Anal. 7, No. 4, 587--599 (2018; Zbl 06992610) Full Text: DOI arXiv OpenURL
Ackermann, Nils; Cano, Alfredo; Hernández-Martínez, Eric Spectral density estimates with partial symmetries and an application to Bahri-Lions-type results. (English) Zbl 1372.35078 Calc. Var. Partial Differ. Equ. 56, No. 1, Paper No. 6, 19 p. (2017). Reviewer: Vladimir Mityushev (Kraków) MSC: 35J05 35J61 PDF BibTeX XML Cite \textit{N. Ackermann} et al., Calc. Var. Partial Differ. Equ. 56, No. 1, Paper No. 6, 19 p. (2017; Zbl 1372.35078) Full Text: DOI OpenURL
Ackermann, Nils; Chagoya, Julián Ground states for irregular and indefinite superlinear Schrödinger equations. (English) Zbl 1347.35114 J. Differ. Equations 261, No. 9, 5180-5201 (2016). MSC: 35J61 35J20 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{J. Chagoya}, J. Differ. Equations 261, No. 9, 5180--5201 (2016; Zbl 1347.35114) Full Text: DOI OpenURL
Ackermann, Nils; Dancer, Norman Precise exponential decay for solutions of semilinear elliptic equations and its effect on the structure of the solution set for a real analytic nonlinearity. (English) Zbl 1389.35071 Differ. Integral Equ. 29, No. 7-8, 757-774 (2016). Reviewer: Florin Catrina (New York) MSC: 35B40 35J91 35J20 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{N. Dancer}, Differ. Integral Equ. 29, No. 7--8, 757--774 (2016; Zbl 1389.35071) Full Text: arXiv OpenURL
Ackermann, Nils; Clapp, Mónica; Pistoia, Angela Boundary clustered layers near the higher critical exponents. (English) Zbl 1288.35240 J. Differ. Equations 254, No. 10, 4168-4193 (2013). Reviewer: Yaping Liu (Pittsburg) MSC: 35J60 35J20 35B33 35B09 PDF BibTeX XML Cite \textit{N. Ackermann} et al., J. Differ. Equations 254, No. 10, 4168--4193 (2013; Zbl 1288.35240) Full Text: DOI arXiv OpenURL
Ackermann, Nils; Clapp, Mónica; Pacella, Filomena Alternating sign multibump solutions of nonlinear elliptic equations in expanding tubular domains. (English) Zbl 1273.35132 Commun. Partial Differ. Equations 38, No. 4-6, 751-779 (2013). MSC: 35J61 35B40 PDF BibTeX XML Cite \textit{N. Ackermann} et al., Commun. Partial Differ. Equations 38, No. 4--6, 751--779 (2013; Zbl 1273.35132) Full Text: DOI arXiv OpenURL
Ackermann, Nils; Szulkin, Andrzej A concentration phenomenon for semilinear elliptic equations. (English) Zbl 1266.35074 Arch. Ration. Mech. Anal. 207, No. 3, 1075-1089 (2013). Reviewer: Dian K. Palagachev (Bari) MSC: 35J61 35B40 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{A. Szulkin}, Arch. Ration. Mech. Anal. 207, No. 3, 1075--1089 (2013; Zbl 1266.35074) Full Text: DOI arXiv OpenURL
Ackermann, Nils; Clapp, Mónica; Pacella, Filomena Self-focusing multibump standing waves in expanding waveguides. (English) Zbl 1229.35285 Milan J. Math. 79, No. 1, 221-232 (2011). MSC: 35Q60 78A50 78A60 PDF BibTeX XML Cite \textit{N. Ackermann} et al., Milan J. Math. 79, No. 1, 221--232 (2011; Zbl 1229.35285) Full Text: DOI OpenURL
Ackermann, Nils Long-time dynamics in semilinear parabolic problems with autocatalysis. (English) Zbl 1181.35136 Du, Yihong (ed.) et al., Recent progress on reaction-diffusion systems and viscosity solutions. Based on the international conference on reaction-diffusion systems and viscosity solutions, Taichung, Taiwan, January 3–6, 2007. Hackensack, NJ: World Scientific (ISBN 978-981-283-473-7/hbk). 1-30 (2009). MSC: 35K58 35K20 35B40 35B33 PDF BibTeX XML Cite \textit{N. Ackermann}, in: Recent progress on reaction-diffusion systems and viscosity solutions. Based on the international conference on reaction-diffusion systems and viscosity solutions, Taichung, Taiwan, January 3--6, 2007. Hackensack, NJ: World Scientific. 1--30 (2009; Zbl 1181.35136) OpenURL
Ackermann, Nils Solution set splitting at low energy levels in Schrödinger equations with periodic and symmetric potential. (English) Zbl 1156.35024 J. Differ. Equations 246, No. 4, 1470-1499 (2009). MSC: 35J60 35J10 35J20 35B05 PDF BibTeX XML Cite \textit{N. Ackermann}, J. Differ. Equations 246, No. 4, 1470--1499 (2009; Zbl 1156.35024) Full Text: DOI OpenURL
Ackermann, Nils; Bartsch, Thomas; Kaplický, Petr; Quittner, Pavol A priori bounds, nodal equilibria and connecting orbits in indefinite superlinear parabolic problems. (English) Zbl 1143.37049 Trans. Am. Math. Soc. 360, No. 7, 3493-3539 (2008). Reviewer: Boris V. Loginov (Ul’yanovsk) MSC: 37L05 35K20 35K55 37L10 47H20 PDF BibTeX XML Cite \textit{N. Ackermann} et al., Trans. Am. Math. Soc. 360, No. 7, 3493--3539 (2008; Zbl 1143.37049) Full Text: DOI OpenURL
Ackermann, Nils; Bartsch, Thomas; Kaplický, Petr An invariant set generated by the domain topology for parabolic semiflows with small diffusion. (English) Zbl 1139.35053 Discrete Contin. Dyn. Syst. 18, No. 4, 613-626 (2007). Reviewer: Christian Pötzsche (München) MSC: 35K55 35K20 35B25 37B30 55M30 PDF BibTeX XML Cite \textit{N. Ackermann} et al., Discrete Contin. Dyn. Syst. 18, No. 4, 613--626 (2007; Zbl 1139.35053) Full Text: DOI OpenURL
Ackermann, Nils A nonlinear superposition principle and multibump solutions of periodic Schrödinger equations. (English) Zbl 1126.35057 J. Funct. Anal. 234, No. 2, 277-320 (2006). Reviewer: Thomas Ernst (Uppsala) MSC: 35Q55 35B10 PDF BibTeX XML Cite \textit{N. Ackermann}, J. Funct. Anal. 234, No. 2, 277--320 (2006; Zbl 1126.35057) Full Text: DOI OpenURL
Ackermann, Nils An abstract approach to multibump solutions of periodic Schrödinger equations and applications. (English) Zbl 1224.35112 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 5-7, e1031-e1037 (2005). MSC: 35J60 35B10 47J30 PDF BibTeX XML Cite \textit{N. Ackermann}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 5--7, e1031--e1037 (2005; Zbl 1224.35112) Full Text: DOI OpenURL
Ackermann, Nils; Bartsch, Thomas Superstable manifolds of semilinear parabolic problems. (English) Zbl 1129.35428 J. Dyn. Differ. Equations 17, No. 1, 115-173 (2005). MSC: 35K20 37L05 35K55 37L10 47H20 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{T. Bartsch}, J. Dyn. Differ. Equations 17, No. 1, 115--173 (2005; Zbl 1129.35428) Full Text: DOI OpenURL
Ackermann, Nils; Weth, Tobias Multibump solutions of nonlinear periodic Schrödinger equations in a degenerate setting. (English) Zbl 1070.35083 Commun. Contemp. Math. 7, No. 3, 269-298 (2005). MSC: 35Q55 35J60 47H07 PDF BibTeX XML Cite \textit{N. Ackermann} and \textit{T. Weth}, Commun. Contemp. Math. 7, No. 3, 269--298 (2005; Zbl 1070.35083) Full Text: DOI OpenURL
Ackermann, Nils A Cauchy-Schwarz type inequality for bilinear integrals on positive measures. (English) Zbl 1066.26013 Proc. Am. Math. Soc. 133, No. 9, 2647-2656 (2005). MSC: 26D15 43A35 35J20 60E15 42A82 PDF BibTeX XML Cite \textit{N. Ackermann}, Proc. Am. Math. Soc. 133, No. 9, 2647--2656 (2005; Zbl 1066.26013) Full Text: DOI OpenURL
Ackermann, Nils On a periodic Schrödinger equation with nonlocal superlinear part. (English) Zbl 1059.35037 Math. Z. 248, No. 2, 423-443 (2004). MSC: 35J60 35Q40 35J20 35B10 49J35 81V70 PDF BibTeX XML Cite \textit{N. Ackermann}, Math. Z. 248, No. 2, 423--443 (2004; Zbl 1059.35037) Full Text: DOI OpenURL
Ackermann, Nils On the multiplicity of sign changing solutions to nonlinear periodic Schrödinger equations. (English) Zbl 1060.35128 Brezis, H. (ed.) et al., Topology methods, variational methods, and their applications. Proceedings of the ICM 2002 satellite conference on nonlinear functional analysis, Taiyuan, China, August 14–18, 2002. River Edge, NJ: World Scientific (ISBN 981-238-262-3/hbk). 1-9 (2003). Reviewer: Messoud A. Efendiev (Berlin) MSC: 35Q55 35B10 PDF BibTeX XML Cite \textit{N. Ackermann}, in: Topology methods, variational methods, and their applications. Proceedings of the ICM 2002 satellite conference on nonlinear functional analysis, Taiyuan, China, August 14--18, 2002. River Edge, NJ: World Scientific. 1--9 (2003; Zbl 1060.35128) OpenURL
Ackermann, Nils Multiple single-peaked solutions of a class of semilinear Neumann problems via the category of the domain boundary. (English) Zbl 0917.35037 Calc. Var. Partial Differ. Equ. 7, No. 3, 263-292 (1998). Reviewer: Charles A.Swanson (Vancouver) MSC: 35J65 35J20 58E05 PDF BibTeX XML Cite \textit{N. Ackermann}, Calc. Var. Partial Differ. Equ. 7, No. 3, 263--292 (1998; Zbl 0917.35037) Full Text: DOI OpenURL