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Structures · Algebra

AddRightCancelMonoid

An additive monoid in which addition is right-cancellative. Main examples are and groups. This is the right typeclass for many sum lemmas, as having a zero is useful to define the sum over the empty set, so AddRightCancelSemigroup is not enough.

Defined in
Mathlib.Algebra.Group.Defs
Shape
One type argument

Extends2

Extended by1

Concrete types that are instances9

  • Matrix
  • DomAddAct
  • Prod
  • OrderDual
  • ULift
  • Lex
  • AddOpposite
  • Colex
  • Additive

How is a type an instance?

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Assumed by38

Ancestors17