Feat(Core): Multiply 2 MOpolynomial together

mapytex/calculus/core/compute/multiply.py

@@ -423,7 +423,7 @@ def momonomial_momonomial(left, right):
 @multiply.register((MOnumber, MOFraction, MOstr, MOstrPower, MOMonomial), \
                    MOpolynomial)
 @special_case(multiply_filter)
-def moscalar_mopolynomial(left, right):
+def lotsmo_mopolynomial(left, right):
     """ Multiply a scalar and a MOMonomial
 
     >>> a = MOnumber(2)
@@ -554,6 +554,62 @@ def moscalar_mopolynomial(left, right):
     coefs = [Tree("*", left, monom) for monom in right.monomials.values()]
     return Tree.from_list("+", coefs)
 
+@multiply.register(MOpolynomial, MOpolynomial)
+@special_case(multiply_filter)
+def mopolynomial_mopolynomial(left, right):
+    """ Multiply 2 MOpolynomial
+
+    >>> a = MOpolynomial('x', [1, 2, 3])
+    >>> b = MOpolynomial('x', [4, 5])
+    >>> print(multiply(a, b))
+    +
+     > +
+     | > *
+     | | > 1
+     | | > 4
+     | > +
+     | | > *
+     | | | > 1
+     | | | > *
+     | | | | > 5
+     | | | | > x
+     | | > *
+     | | | > *
+     | | | | > 2
+     | | | | > x
+     | | | > 4
+     > +
+     | > *
+     | | > *
+     | | | > 2
+     | | | > x
+     | | > *
+     | | | > 5
+     | | | > x
+     | > +
+     | | > *
+     | | | > *
+     | | | | > 3
+     | | | | > ^
+     | | | | | > x
+     | | | | | > 2
+     | | | > 4
+     | | > *
+     | | | > *
+     | | | | > 3
+     | | | | > ^
+     | | | | | > x
+     | | | | | > 2
+     | | | > *
+     | | | | > 5
+     | | | | > x
+
+    """
+    coefs = [Tree("*", l_monom, r_monom) \
+             for l_monom in left.monomials.values() \
+             for r_monom in right.monomials.values()]
+    return Tree.from_list("+", coefs)
+
 
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