(* Copyright 2012 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *   http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * Authors: Russell O'Connor *)
Require Vector.
Set Asymmetric Patterns.
Set Implicit Arguments.
Unset Strict Implicit.

Lemma append_inj a n m (v1 v1' : Vector.t a n) (v2 v2' : Vector.t a m) :
Vector.append v1 v2 = Vector.append v1' v2' -> v1 = v1' /\ v2 = v2'.