Description: Lemma for frege133 . Proposition 132 of Frege1879 p. 86. (Contributed by RP, 9-Jul-2020) (Proof modification is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | frege130.m | |
|
frege130.r | |
||
Assertion | frege132 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege130.m | |
|
2 | frege130.r | |
|
3 | 1 2 | frege131 | |
4 | frege9 | |
|
5 | 3 4 | ax-mp | |