From 5655750e12d3459c1237588f8dec3fc883a966b7 Mon Sep 17 00:00:00 2001
From: Josh Chen
Date: Mon, 28 Jun 2021 16:06:19 +0100
Subject: 1. Thm/def statement display. 2. Syntax + computation proof.

---
 hott/List_HoTT.thy | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'hott')

diff --git a/hott/List_HoTT.thy b/hott/List_HoTT.thy
index a48d2ab..dc52320 100644
--- a/hott/List_HoTT.thy
+++ b/hott/List_HoTT.thy
@@ -10,8 +10,8 @@ section \<open>Length\<close>
 definition [implicit]: "len \<equiv> ListRec {} Nat 0 (fn _ _ rec. suc rec)"
 
 experiment begin
-  Lemma "len [] \<equiv> ?n" by compute
-  Lemma "len [0, suc 0, suc (suc 0)] \<equiv> ?n" by compute
+  Lemma "len [] \<equiv> ?n" by (subst comp; typechk?)+
+  Lemma "len [0, suc 0, suc (suc 0)] \<equiv> ?n" by (subst comp; typechk?)+
 end
 
 
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