úΕ–   Definition of rings  Addition Multiplication Compute additive inverse The additive identity The multiplicative identity Specification of rings. 2 Test that the arguments satisfy the ring axioms.  Subtraction  Summation Product Exponentiation          constructive-algebra-0.0.0Algebra.Structures.RingRing<+><*>negzeroonepropRing<->sumRing productRing<^> propAddAssocpropAddIdentity propAddInv propAddComm propMulAssoc propRightDist propLeftDistpropMulIdentity