package coq-core

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The Coq Proof Assistant -- Core Binaries and Tools

Install

Dune Dependency

coq.inria.fr Readme Edit opam file Versions (9)

Authors

T

The Coq development team, INRIA, CNRS, and contributors

Maintainers

T

The Coq development team <coqdev@inria.fr>

Sources

coq-8.19.0.tar.gz

md5=64b49dbc3205477bd7517642c0b9cbb6

sha512=02fb5b4fb575af79e092492cbec6dc0d15a1d74a07f827f657a72d4e6066532630e5a6d15be4acdb73314bd40b9a321f9ea0584e0ccfe51fd3a56353bd30db9b

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

Module `UVars.Variance`Source

Sourcetype t =

| Irrelevant
| Covariant
| 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