there is an error in the Levi Civita symbol in 2D: in the following I should see 2 zero values, a +1 (in position 01) and a -1 (in position 10). Can you fix this bug/feature ?
from ngsolve import *
from ngsolve.webgui import Draw
from ngsolve.fem import LeviCivitaSymbol, Einsum
lc2 = LeviCivitaSymbol(2)
mesh = Mesh(unit_square.GenerateMesh(maxh=0.2))
Draw(lc2[0,0], mesh)
Draw(lc2[0, 1], mesh)
Draw(lc2[1, 0], mesh)
Draw(lc2[1, 1], mesh)