TY - JOUR AU - Isac, George PY - 2001/09/01 Y2 - 2024/03/28 TI - Leray-Schauder type alternatives and the solvability of complementarity problems JF - Topological Methods in Nonlinear Analysis JA - TMNA VL - 18 IS - 1 SE - DO - UR - https://apcz.umk.pl/TMNA/article/view/TMNA.2001.031 SP - 191 - 204 AB - We present in this paper several existence theorems for nonlinear complementarity problems in Hilbert spaces. Our results are based on the concept of``exceptional family of elements'' and onLeray-Schauder type altrenatives. ER -