A Symmetric Mountain Pass Lemma and Its Application to an Equation for a Class of Quasilinear Elliptic Operators in a Variable Exponent Sobolev Space. Communications in Mathematical Research, [S. l.], 2026. DOI: 10.4208/cmr.2026-0019. Disponível em: https://global-sci.com/cmr/article/view/23906. Acesso em: 14 apr. 2026.