Fix(Core): degree method of MOpolynomial

mapytex/calculus/core/MO/polynomial.py

@@ -71,7 +71,19 @@ class MOpolynomial(MO):
 
     @property
     def degree(self):
-        return self._power
+        """ 
+        Maximum degree of its coefficient 
+
+        :example:
+        >>> p = MOpolynomial('x', [1, 2, 3])
+        >>> p.degree
+        <MOnumber 2>
+        >>> p = MOpolynomial('x', {0: 1, 3: 4})
+        >>> p.degree
+        <MOnumber 3>
+
+        """
+        return max(self._coefs.keys())
 
     @property
     def coefficients(self):