Rngs

class sage.categories.rngs.Rngs(s=None)

Bases: sage.categories.category_singleton.Category_singleton

The category of rngs associative rings, not necessarily commutative, and not necessarily with 1 This is a combination of an abelian group (+) and a semigroup (*), with * distributing over +

EXAMPLES:

sage: Rngs()
Category of rngs
sage: Rngs().super_categories()
[Category of commutative additive groups, Category of semigroups]

TESTS:

sage: TestSuite(Rngs()).run()
class ElementMethods
class Rngs.ParentMethods
Rngs.super_categories()

EXAMPLES:

sage: Rngs().super_categories()
[Category of commutative additive groups, Category of semigroups]

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