(13steps) PrintForm Definitions Lemmas int 2 Sections StandardLIB Doc

At: pos mul arg bounds 1 2
1. a:
2. b:
3. ab > 0
4. a = 0

a > 0 & b > 0 a < 0 & b < 0
By: HypSubst 4 3
Generated subgoals:

None

About:
intnatural_numbermultiplyless_thanequalandor

(13steps) PrintForm Definitions Lemmas int 2 Sections StandardLIB Doc