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Theorems · Theorem · order theory

tsub_tsub_cancel_of_le

∀ {α : Type u_1} [inst : AddCommSemigroup α] [inst_1 : PartialOrder α] [ExistsAddOfLE α] [AddLeftMono α]
  [inst_4 : Sub α] [OrderedSub α] {a b : α} [AddLeftReflectLE α], a ≤ b → b - (b - a) = a

See tsub_tsub_le for an inequality.

Defined in
Mathlib.Algebra.Order.Sub.Unbundled.Basic
Cited by
10 results in Mathlib
Foundations
Depth 12 from the axioms · uses propext, Quot.sound
Assumes
AddCommSemigroupPartialOrderExistsAddOfLEAddLeftMonoSubOrderedSubAddLeftReflectLE

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