PageHeader : Funkcialaj Ekvacioj, 42 (1999) 281-289 Title : Penalty Method for Variational Inequalities and Title : Its Error Estimates AuthorInfo : By AuthorInfo : Masayoshi TSUTSUMI and Takatoshi YASUDA AuthorInfo : (Waseda University, Japan) section : 1. Introduction section : 2. Existence Theorem section : 3. Error estimates section : References