% -*- texinfo -*-
% @deftypefn {Function File} @
% {@var{A}} = BIM3Alaplacian (@var{mesh}, @var{alpha}, @var{eta})
%
% Builds the Laplacian matrix for the discretization of the LHS of the
% equation
% @iftex
% @tex
% $ -div ( \alpha ( \eta \vect{\nabla} u ) $
% @end tex
% @end iftex
% @ifnottex
% -div (@var{alpha} (@var{eta} grad u ) = f
% @end ifnottex
%
% where:
% @itemize @minus
% @item @var{alpha}: element-wise constant scalar function
% @item @var{eta}: piecewise linear conforming scalar functions
% @end itemize
%
% @seealso{BIM3Arhs, BIM3Areaction, BIM3Cmeshproperties}
% @end deftypefn