biharmonic_2d, a FORTRAN77 library which solves a version of the biharmonic equation in two dimensions, by Petter Bjorstad.
The equation has the form:
u + 2*u + u + alpha*(u +u ) + beta*u = f(x,y) xxxx xxyy yyyy xx yy
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
biharmonic_2d is available in a FORTRAN77 version.
Petter Bjorstad