poissonsystem.form

来自「finite element library for mathematic ma」· FORM 代码 · 共 17 行

# Copyright (C) 2005-2007 Anders Logg ([e-mail])
# Licensed under the GNU GPL version 3 or any later version
#
# The bilinear form a(v, u) and linear form L(v) for
# Poisson's equation in system form (vector-valued).
#
# Compile this form with FFC: ffc PoissonSystem.form

element = VectorElement("Lagrange", "triangle", 2)

v = TestFunction(element)
u = TrialFunction(element)
f = Function(element)

a = dot(grad(v), grad(u))*dx
L = dot(v, f)*dx