A. Gachechiladze, D. Natroshvili
abstract:
The purpose of the paper is reducing the 
three-dimensional Signorini problem to a variational inequality which 
occurs on the two-dimensional boundary of a domain occupied by an elastic 
anisotropic body. The uniqueness and existence 
theorems for the solution of the  boundary variational inequality are proved 
and a boundary element procedure together with an abstract error estimate 
is described for the Galerkin  numerical approximation