debian man page for lumped_mass

lumped_mass(3rheolef)						    rheolef-6.1 					     lumped_mass(3rheolef)

NAME
       lumped_mass -- lumped L2 scalar product

SYNOPSIS
	       form(const space& V, const space& V, "lumped_mass");
	       form(const space& M, const space& V, "lumped_mass");
	       form (const space& V, const space& V, "lumped_mass", const domain& gamma);
	       form_diag(const space& V, "mass");

EXAMPLE
       The use of lumped mass form write:

	       form m(V, "lumped_mass");

       or (see also mass(3)):

	       form_diag md(V, "mass");

       The  lumped procedure sums all extra-diagonal terms on the diagonal: let us denote M the original mass matrix, then, the lumped mass matrix
       is the diagonal matrix defined by:

			   n
			  ----
				  M1(i,i) =  /	  M(i,j)
			  ----
			   j=1

SEE ALSO
       mass(3)

rheolef-6.1							    rheolef-6.1 					     lumped_mass(3rheolef)