Bonanno, Gabriele; Livrea, Roberto A proof of the Ghoussoub-Preiss theorem by the \(\varepsilon\)-perturbation of Brezis-Nirenberg. (English) Zbl 1492.58009 Houston J. Math. 47, No. 1, 165-191 (2021). Reviewer: Xiaoming He (Beijing) MSC: 58E05 49J35 PDFBibTeX XMLCite \textit{G. Bonanno} and \textit{R. Livrea}, Houston J. Math. 47, No. 1, 165--191 (2021; Zbl 1492.58009) Full Text: Link
Abdelhedi, Wael; Hajaiej, Hichem; Mhamdi, Zeinab A Morse lemma at infinity for nonlinear elliptic fractional equations. (English) Zbl 1484.35211 Rend. Semin. Mat. Univ. Padova 146, 1-42 (2021). MSC: 35J61 35R11 35J67 PDFBibTeX XMLCite \textit{W. Abdelhedi} et al., Rend. Semin. Mat. Univ. Padova 146, 1--42 (2021; Zbl 1484.35211) Full Text: DOI
Eftekharinasab, Kaveh; Lastivka, Ivan A Lusternik-Schnirelmann type theorem for \(C^1\)-Fréchet manifolds. (English) Zbl 1488.58009 J. Indian Math. Soc., New Ser. 88, No. 3-4, 309-322 (2021). MSC: 58E05 58E30 PDFBibTeX XMLCite \textit{K. Eftekharinasab} and \textit{I. Lastivka}, J. Indian Math. Soc., New Ser. 88, No. 3--4, 309--322 (2021; Zbl 1488.58009)
Pires, Leonardo; La Guardia, Giuliano G. A Lipschitz version of the \(\lambda\)-lemma and a characterization of homoclinic and heteroclinic orbits. (English) Zbl 1493.37032 Qual. Theory Dyn. Syst. 20, No. 3, Paper No. 82, 15 p. (2021). Reviewer: Mohammad Reza Molaei (Kerman) MSC: 37D15 37D05 37D10 37C29 PDFBibTeX XMLCite \textit{L. Pires} and \textit{G. G. La Guardia}, Qual. Theory Dyn. Syst. 20, No. 3, Paper No. 82, 15 p. (2021; Zbl 1493.37032) Full Text: DOI arXiv
Gitman, Victoria; Hamkins, Joel David; Karagila, Asaf Kelley-Morse set theory does not prove the class Fodor principle. (English) Zbl 07419456 Fundam. Math. 254, No. 2, 133-154 (2021). MSC: 03E70 03E25 03E35 PDFBibTeX XMLCite \textit{V. Gitman} et al., Fundam. Math. 254, No. 2, 133--154 (2021; Zbl 07419456) Full Text: DOI arXiv Backlinks: MO
Li, Desheng; Jia, Mo On the Morse theory of attractors: a functional approach. (English) Zbl 1478.37079 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 212, Article ID 112466, 24 p. (2021). MSC: 37L30 35B41 37B25 37B35 PDFBibTeX XMLCite \textit{D. Li} and \textit{M. Jia}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 212, Article ID 112466, 24 p. (2021; Zbl 1478.37079) Full Text: DOI
Meinrenken, Eckhard Euler-like vector fields, normal forms, and isotropic embeddings. (English) Zbl 1465.53037 Indag. Math., New Ser. 32, No. 1, 224-245 (2021). Reviewer: Vladimir Yu. Rovenskij (Nesher) MSC: 53B25 PDFBibTeX XMLCite \textit{E. Meinrenken}, Indag. Math., New Ser. 32, No. 1, 224--245 (2021; Zbl 1465.53037) Full Text: DOI arXiv Backlinks: MO
Lowry-Duda, David; Wheeler, Miles H. Perturbing the mean value theorem: implicit functions, the Morse lemma, and beyond. (English) Zbl 1456.26006 Am. Math. Mon. 128, No. 1, 50-61 (2021). Reviewer: Symon Serbenyuk (Kyïv) MSC: 26A24 26A06 26A15 PDFBibTeX XMLCite \textit{D. Lowry-Duda} and \textit{M. H. Wheeler}, Am. Math. Mon. 128, No. 1, 50--61 (2021; Zbl 1456.26006) Full Text: DOI