Subtraction of two non-homogenous monomial in a non-commutative ring
asked 2013-10-07 04:11:34 -0500
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Hi every one,
I have a problem for subtracting two non-homogenous monomial "xyyx-xyx" in a unital associative free algebra with two generators x&y.
The error which is appeared is "ArithmaticError : can only subtract the elements of the same degree".
I will apreciate some one who tell me what is the soloution.