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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 7023 breng 7033 bren 7034 xpcomf1o 7127 frechashgf1o 10886 sumeq1 12146 fisumss 12184 fsumcnv 12229 prodeq1f 12344 4sqlem11 13209 ennnfonelemhf1o 13362 ennnfonelemex 13363 ssnnctlemct 13395 uspgredgiedg 16624 |
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