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Theorems · Theorem · commutative algebra

AdicCompletion.map_ext

∀ {R : Type u_1} [inst : CommRing R] (I : Ideal R) {M : Type u_2} [inst_1 : AddCommGroup M] [inst_2 : Module R M]
  {N : Sort u_6} {f g : AdicCompletion I M → N},
  (∀ (a : AdicCompletion.AdicCauchySequence I M), f ((AdicCompletion.mk I M) a) = g ((AdicCompletion.mk I M) a)) → f = g

Equality of maps out of an adic completion can be checked on Cauchy sequences.

Defined in
Mathlib.RingTheory.AdicCompletion.Functoriality
Cited by
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Foundations
Depth 103 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
CommRingAddCommGroupModule

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