Description: Equality deduction for functions. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
---|---|---|---|
Hypotheses | feq1dd.eq | |
|
feq1dd.f | |
||
Assertion | feq1dd | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | feq1dd.eq | |
|
2 | feq1dd.f | |
|
3 | 1 | feq1d | |
4 | 2 3 | mpbid | |