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| author |  Jason Gross <jgross@mit.edu> | 2018-09-14 21:16:12 -0400 |
|---|---|---|
| committer | Jason Gross <jgross@mit.edu> | 2018-09-14 21:16:12 -0400 |
| commit | b98ec63895887435aa6f08436715200d33a62d98 (patch) | |
| tree | c605dc8fe8656a628e5fa4edf097d972f7fbfd62 /src/Util/Equality.v | |
| parent | a3a077040a311f32199c86700a463a5cf661b76a (diff) | |
Add PrimitiveSigma
Diffstat (limited to 'src/Util/Equality.v')
| -rw-r--r-- | src/Util/Equality.v | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Util/Equality.v b/src/Util/Equality.v index 04335dbd4..d1a711821 100644 --- a/src/Util/Equality.v +++ b/src/Util/Equality.v @@ -8,6 +8,13 @@ Require Import Coq.Classes.Morphisms. Require Import Crypto.Util.Isomorphism. Require Import Crypto.Util.HProp. +Import EqNotations. + +Definition f_equal_dep {A B} (f : forall a : A, B a) (x y : A) (H : x = y) : rew [B] H in f x = f y + := match H with + | eq_refl => eq_refl + end. + (** Most of the structure of proofs of equalities fits into what mathematicians call a weak ∞-groupoid. (In fact, one way of *defining* a weak ∞-groupoid is via what's called the J-rule, |