Groli, Alessandro; Saccon, Claudio Bifurcation for variational inequalities with strongly indefinite quadratic part. (English) Zbl 1150.58303 Differ. Integral Equ. 17, No. 7-8, 943-960 (2004). Summary: We study the existence of bifurcation points for variational inequalities with strongly indefinite quadratic part. We use a nonsmooth variational framework. An application to an elliptic system with an obstacle is given. MSC: 58E07 Variational problems in abstract bifurcation theory in infinite-dimensional spaces 35J85 Unilateral problems; variational inequalities (elliptic type) (MSC2000) 35B32 Bifurcations in context of PDEs Keywords:variational inequalities; bifurcation; indefinite quadratic part PDF BibTeX XML Cite \textit{A. Groli} and \textit{C. Saccon}, Differ. Integral Equ. 17, No. 7--8, 943--960 (2004; Zbl 1150.58303)