package coq-core

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The Coq Proof Assistant -- Core Binaries and Tools

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coq-8.19.1.tar.gz
md5=13d2793fc6413aac5168822313e4864e
sha512=ec8379df34ba6e72bcf0218c66fef248b0e4c5c436fb3f2d7dd83a2c5f349dd0874a67484fcf9c0df3e5d5937d7ae2b2a79274725595b4b0065a381f70769b42

doc/coq-core.kernel/UVars/Variance/index.html

Module UVars.VarianceSource

Sourcetype t =
  1. | Irrelevant
  2. | Covariant
  3. | Invariant

A universe position in the instance given to a cumulative inductive can be the following. Note there is no Contravariant case because forall x : A, B <= forall x : A', B' requires A = A' as opposed to A' <= A.

Sourceval check_subtype : t -> t -> bool

check_subtype x y holds if variance y is also an instance of x

Sourceval sup : t -> t -> t
Sourceval pr : t -> Pp.t
Sourceval equal : t -> t -> bool
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