lib/dydx/algebra.rb in dydx-0.1.314 vs lib/dydx/algebra.rb in dydx-0.1.412

@@ -1,20 +1,22 @@
 require 'dydx/algebra/set'
-require 'dydx/algebra/formula'
-require 'dydx/algebra/inverse'
 
 module Dydx
   module Algebra
     include Set
 
     class Formula;  include Operator::Formula; end
     class Inverse;  include Operator::Inverse; end
 
+    # TODO: Cyclomatic complexity for inverse is too high. [7/6]
     def inverse(x, operator)
-      if operator == :+ && x.is_0?
-        e0
-      elsif operator == :* && x.is_1?
-        e1
+      if x.num?
+        x = x.to_numeric
+        if operator == :+
+          _(- x)
+        else
+          _(Rational(1, x))
+        end
       elsif x.is_a?(Inverse) && x.operator == operator
         x.x
       else
         Inverse.new(x, operator)
       end