Description: A lemma used to prove bj-cbval in a weak axiomatization. (Contributed by BJ, 12-Mar-2023) (Proof modification is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | bj-cbvalim |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax5e | ||
2 | 1 | ax-gen | |
3 | ax-5 | ||
4 | bj-cbvalimt | ||
5 | 4 | com3l | |
6 | 5 | com14 | |
7 | 2 3 6 | mp2 |