Does a subtraction symbolic expression actually exist?
Can someone please give me an example of a symbolic expression in sage of the subtraction variety? (by subtraction variety I mean using the subtraction operator)
Precisely: how can I create an object
o of type
sage.symbolic.expression.Expression such that
operator.sub? It seems that subtraction expressions are always converted to additions.
sage: x = var('x') sage: (x-1).operator() <built-in function add>