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# Harmonic map demo using one mixed function u to represent x and y.
# Author: Martin Alnes
# Date: 2009-04-09
#
cell = triangle
X = VectorElement("Lagrange", cell, 1)
Y = FiniteElement("Lagrange", cell, 1)
M = X * Y
u = Coefficient(M)
x, y = split(u)
L = inner(grad(x), grad(x))*dx + dot(x,x)*y*dx
F = derivative(L, u)
J = derivative(F, u)
forms = [L,F,J]
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