Description: Inference to convert a function and domain antecedent. (Contributed by NM, 22-Apr-2004)
Ref | Expression | ||
---|---|---|---|
Hypothesis | funfni.1 | |
|
Assertion | funfni | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | funfni.1 | |
|
2 | fnfun | |
|
3 | fndm | |
|
4 | 3 | eleq2d | |
5 | 4 | biimpar | |
6 | 2 5 1 | syl2an2r | |