diff options
| author | Josh Chen | 2020-04-02 23:27:06 +0200 |
|---|---|---|
| committer | Josh Chen | 2020-04-02 23:27:06 +0200 |
| commit | 2781c68f0fdb435827097efc497c2172d6050e50 (patch) | |
| tree | 4f0e05000a490b9b9e33e8d082d96bfd5d83152f /spartan/theories/Spartan.thy | |
| parent | 0ddab0fe11c33fc559fc8fb58528618efdbc93a4 (diff) | |
1. make id function an abbrev. 2. fix reduce method
Diffstat (limited to '')
| -rw-r--r-- | spartan/theories/Spartan.thy | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/spartan/theories/Spartan.thy b/spartan/theories/Spartan.thy index ac12937..a79f209 100644 --- a/spartan/theories/Spartan.thy +++ b/spartan/theories/Spartan.thy @@ -242,7 +242,7 @@ setup \<open> ctxt addSolver (mk_solver "" typechk_tac)) \<close> -method reduce uses add = (simp add: comps add | subst comps, reduce add: add)+ +method reduce uses add = (simp add: comps add | subst comps)+ section \<open>Implicit notations\<close> @@ -355,23 +355,21 @@ translations "g \<circ> f" \<leftharpoondown> "g \<circ>\<^bsub>A\<^esub> f" subsection \<open>Identity function\<close> -definition id where "id A \<equiv> \<lambda>x: A. x" +abbreviation id where "id A \<equiv> \<lambda>x: A. x" lemma - idI [typechk]: "A: U i \<Longrightarrow> id A: A \<rightarrow> A" and - id_comp [comps]: "x: A \<Longrightarrow> (id A) x \<equiv> x" - unfolding id_def by reduce + id_type[typechk]: "A: U i \<Longrightarrow> id A: A \<rightarrow> A" and + id_comp [comps]: "x: A \<Longrightarrow> (id A) x \<equiv> x" \<comment> \<open>for the occasional manual rewrite\<close> + by reduce lemma id_left [comps]: assumes "f: A \<rightarrow> B" "A: U i" "B: U i" shows "(id B) \<circ>\<^bsub>A\<^esub> f \<equiv> f" - unfolding id_def by (subst eta_exp[of f]) (reduce, rule eta) lemma id_right [comps]: assumes "f: A \<rightarrow> B" "A: U i" "B: U i" shows "f \<circ>\<^bsub>A\<^esub> (id A) \<equiv> f" - unfolding id_def by (subst eta_exp[of f]) (reduce, rule eta) lemma id_U [typechk]: |