Galerkin approximation of linear problems in Banach and Hilbert spaces

Wolfgang Arendt, Isabelle Chalendar, Robert Eymard

In this paper we study the conforming Galerkin approximation of the problem: find u $\in$ U such that a(u, v) = <L, v> for all v $\in$ V, where U and V are Hilbert or Banach spaces…