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 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