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-rw-r--r--backends/hol4/primitivesArithTheory.sig9
1 files changed, 7 insertions, 2 deletions
diff --git a/backends/hol4/primitivesArithTheory.sig b/backends/hol4/primitivesArithTheory.sig
index 73a6cf20..b2172b7c 100644
--- a/backends/hol4/primitivesArithTheory.sig
+++ b/backends/hol4/primitivesArithTheory.sig
@@ -7,7 +7,8 @@ sig
val gt_eq_lt : thm
val int_add : thm
val int_induction : thm
- val int_of_num : thm
+ val int_induction_ideal : thm
+ val int_of_num_id : thm
val int_of_num_inj : thm
val le_eq_ge : thm
val lt_eq_gt : thm
@@ -44,9 +45,13 @@ sig
[int_induction] Theorem
+ ⊢ ∀P. (∀i. i < 0 ⇒ P i) ∧ P 0 ∧ (∀i. P i ⇒ P (i + 1)) ⇒ ∀i. P i
+
+ [int_induction_ideal] Theorem
+
⊢ ∀P. P 0 ∧ (∀i. 0 ≤ i ∧ P i ⇒ P (i + 1)) ⇒ ∀i. 0 ≤ i ⇒ P i
- [int_of_num] Theorem
+ [int_of_num_id] Theorem
⊢ ∀i. 0 ≤ i ⇒ &Num i = i