Abstract
We consider a class of quasilinear elliptic equations whose principal part includes the p-area and the p-Laplace operators, when p lies in a suitable left neighborhood of 2. For the critical points of the associated functional, we provide estimates of the corresponding critical groups, under assumptions that do not guarantee any further regularity of the critical point.
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A. Abbondandolo and M. Schwarz, A smooth pseudo-gradient for the Lagrangian action functional, Adv. Nonlinear Stud. 9 (2009), 597–623.
A. Aftalion and F. Pacella, Morse index and uniqueness for positive solutions of radial p–Laplace equations, Trans. Amer. Math. Soc. 356 (2004), 4255–4272.
S. Almi and M. Degiovanni, On degree theory for quasilinear elliptic equations with natural growth conditions, in Recent Trends in Nonlinear Partial Differential Equations II: Stationary Problems (Perugia, 2012), J.B. Serrin, E.L. Mitidieri and V.D. Rädulescu eds., 1-20, Contemporary Mathematics, 595, Amer. Math. Soc., Providence, R.I., 2013.
F.E. Browder, Fixed point theory and nonlinear problems, Bull. Amer. Math. Soc. (N.S.) 9 (1983), 1–39.
K.C. Chang, Morse theory on Banach space and its applications to partial differential equations, Chinese Ann. Math. Ser. B 4 (1983), 381–399.
K.C. Chang, Infinite-dimensional Morse theory and multiple solution problems, Progress in Nonlinear Differential Equations and their Applications, 6, Birkhäuser, Boston, 1993.
K.C. Chang, Morse theory in nonlinear analysis, in Nonlinear Functional Analysis and Applications to Differential Equations (Trieste, 1997), A. Ambrosetti, K.C. Chang, I. Ekeland eds., 60-101, World Sci. Publishing, River Edge, NJ, 1998.
S. Cingolani and M. Degiovanni, On the Poincaré-Hopf Theorem for functionals defined on Banach spaces, Advanced Nonlinear Stud. 9 (2009), 679–699.
S. Cingolani, M. Degiovanni and G. Vannella, On the critical polynomial of functionals related to p-area (1 < p < ∞) and p-Laplace (1 < p ≤ 2) type operators, Atti Accad. Naz. Lincei Rend. Lincei Mat. Appl. 26 (2015), 49–56.
S. Cingolani, M. Degiovanni and G. Vannella, Critical group estimates for functionals related to p-area (1 < p < ∞) and p-Laplace (1 < p ≤ 2) type operators, Quaderni del Seminario Matematico di Brescia, 14/2014, Brescia, 2014.
S. Cingolani and G. Vannella, Critical groups computations on a class of Sobolev Banach spaces via Morse index, Ann. Inst. H. Poincaré Anal. Non Linéaire 20 (2003), 271–292.
S. Cingolani and G. Vannella, Morse index computations for a class of functionals defined in Banach spaces, in Nonlinear Equations: Methods, Models and Applications (Bergamo, 2001), D. Lupo, C. Pagani and B. Ruf, eds., 107-116, Progr. Nonlinear Differential Equations Appl., 54, Birkhäuser, Basel, 2003.
S. Cingolani and G. Vannella, Morse index and critical groups for p-Laplace equations with critical exponents, Mediterr. J. Math. 3 (2006), 495–512.
S. Cingolani and G. Vannella, Marino-Prodi perturbation type results and Morse indices of minimax critical points for a class of functionals in Banach spaces, Ann. Mat. Pura Appl. (4) 186 (2007), 157–185.
M. Degiovanni, On topological Morse theory, J. Fixed Point Theory Appl. 10 (2011), 197–218.
D. Gromoll and W. Meyer, On differentiable functions with isolated critical points, Topology 8 (1969), 361–369.
A.D. Ioffe, On lower semicontinuity of integral functionals. II, SIAM. J. Control Optimization 15 (1977), 991–1000.
S. Lancelotti, Morse index estimates for continuous functionals associated with quasilinear elliptic equations, Adv. Differential Equations 7 (2002), 99–128.
J. Mawhin and M. Willem, Critical point theory and Hamiltonian systems, Applied Mathematical Sciences, 74, Springer-Verlag, New York, 1989.
I.V. Skrypnik, Methods for analysis of nonlinear elliptic boundary value problems, Translations of Mathematical Monographs, 139, American Mathematical Society, Providence, RI, 1994.
E.H. Spanier, Algebraic topology, McGraw-Hill Book Co., New York, 1966.
A.J. Tromba, A general approach to Morse theory, J. Differential Geometry 12 (1977), 47–85.
K. Uhlenbeck, Morse theory on Banach manifolds, J. Funct. Anal. 10 (1972), 430–445.
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The research of the authors was partially supported by Gruppo Nazionale per l’Analisi Matematica, la Probabilità e le loro Applicazioni (INdAM)
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Cingolani, S., Degiovanni, M. & Vannella, G. Critical Group Estimates for Nonregular Critical Points of Functionals Associated With Quasilinear Elliptic Equations. J Elliptic Parabol Equ 1, 75–87 (2015). https://doi.org/10.1007/BF03377369
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DOI: https://doi.org/10.1007/BF03377369