package coq-core

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The Coq Proof Assistant -- Core Binaries and Tools

Install 

dune-project
 Dependency

coq.inria.fr Readme Edit opam file Versions (11)

Authors

  1. T
    The Coq development team, INRIA, CNRS, and contributors

Maintainers

  1. T
    The Coq development team <coqdev@inria.fr>

Sources

coq-8.20.0.tar.gz
md5=66e57ea55275903bef74d5bf36fbe0f1
sha512=1a7eac6e2f58724a3f9d68bbb321e4cfe963ba1a5551b9b011db4b3f559c79be433d810ff262593d753770ee41ea68fbd6a60daa1e2319ea00dff64c8851d70b

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