The function wdegree computes the degree of an expression, considered as a form.

The function wdegree returns nonhmg when the expression is a sum of forms which have different degrees.

Expressions of type scalar or const have wdegree = 0.

The wdegree of an indexed name is the wdegree of the name without the index, unless explicitly stated.

The command with(difforms,wdegree) allows the use of the abbreviated form of this command.