Commit 5fabef11 authored by Björn Brandenburg's avatar Björn Brandenburg

add [n + k <= m => n <= m] helper lemma

parent d6cdcfe1
......@@ -118,6 +118,17 @@ Section NatLemmas.
intros* AC. ssromega.
(* We can drop additive terms on the lesser side of an inequality. *)
Lemma leq_addk:
forall m n k,
n + k <= m ->
n <= m.
move=> m n p.
apply leq_trans.
by apply leq_addr.
End NatLemmas.
Section Interval.
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