package coq

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Formal proof management system

Install

Dune Dependency

coq.inria.fr Edit opam file Versions (38)

Authors

T

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

Maintainers

C

coqdev@inria.fr

Sources

coq-8.14.1.tar.gz

sha256=3cbfc1e1a72b16d4744f5b64ede59586071e31d9c11c811a0372060727bfd9c3

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

Module `Univ.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