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| Mirrors > Home > ILE Home > Th. List > f1oeq3 | Unicode version | ||
| Description: Equality theorem for one-to-one onto functions. (Contributed by NM, 10-Feb-1997.) |
| Ref | Expression |
|---|---|
| f1oeq3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1eq3 5598 |
. . 3
| |
| 2 | foeq3 5616 |
. . 3
| |
| 3 | 1, 2 | anbi12d 477 |
. 2
|
| 4 | df-f1o 5387 |
. 2
| |
| 5 | df-f1o 5387 |
. 2
| |
| 6 | 3, 4, 5 | 3bitr4g 223 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 |
| This theorem is used by: f1oeq23 5633 f1oeq123d 5636 f1oeq3d 5639 f1ores 5657 resdif 5664 f1osng 5685 f1oresrab 5876 isoeq5 6014 isoini2 6028 rinvf1o 6038 mapsnf1o 7025 breng 7035 bren 7036 xpcomf1o 7129 frechashgf1o 10885 sumeq1 12145 fisumss 12183 fsumcnv 12228 prodeq1f 12343 4sqlem11 13208 ennnfonelemhf1o 13361 ennnfonelemex 13362 ssnnctlemct 13394 uspgredgiedg 16641 |
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