Maxima Function
coord (tensor_1, tensor_2, ...)
Gives tensor_i the coordinate differentiation property that the
derivative of contravariant vector whose name is one of the
tensor_i yields a Kronecker delta. For example, if coord(x)
has
been done then idiff(x([],[i]),j)
gives kdelta([i],[j])
.
coord
is a list of all indexed objects having this property.