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Mirrors > Home > MPE Home > Th. List > f1oeq1 | Structured version Visualization version Unicode version |
Description: Equality theorem for one-to-one onto functions. (Contributed by NM, 10-Feb-1997.) |
Ref | Expression |
---|---|
f1oeq1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1eq1 6096 | . . 3 | |
2 | foeq1 6111 | . . 3 | |
3 | 1, 2 | anbi12d 747 | . 2 |
4 | df-f1o 5895 | . 2 | |
5 | df-f1o 5895 | . 2 | |
6 | 3, 4, 5 | 3bitr4g 303 | 1 |
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