Ty = Sequence(Segment[(0, t, -0.1), (0, t, 0.1)], t, 1, 6)
Tx = Sequence(Segment[(t, 0, -0.1), (t, 0, 0.1)], t, 1, 6)
Tz = Sequence(Segment[(0, -0.1, t), (0, 0.1, t)], t, 1, 6)
u = Vector((0, 0, 0), (7, 0, 0))
w = Vector((0, 0, 0), (0, 0, 7))
Kx = Sequence(Text[n, (n, 0)], n, 1, 6)
Ky = Sequence(Text[n, (0, n)], n, 1, 6)
v = Vector((0, 0, 0), (0, 7, 0))
f(x, y) = sin(sqrt(x^(2) + y^(2)))