| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5595 |
. . 3
| |
| 2 | foeq3 5613 |
. . 3
| |
| 3 | 1, 2 | anbi12d 477 |
. 2
|
| 4 | df-f1o 5384 |
. 2
| |
| 5 | df-f1o 5384 |
. 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 5381 df-f1 5382 df-fo 5383 df-f1o 5384 |
| This theorem is used by: f1oeq23 5630 f1oeq123d 5633 f1oeq3d 5636 f1ores 5654 resdif 5661 f1osng 5682 f1oresrab 5873 isoeq5 6011 isoini2 6025 rinvf1o 6035 mapsnf1o 7019 breng 7029 bren 7030 xpcomf1o 7123 frechashgf1o 10878 sumeq1 12137 fisumss 12175 fsumcnv 12220 prodeq1f 12335 4sqlem11 13200 ennnfonelemhf1o 13353 ennnfonelemex 13354 ssnnctlemct 13386 uspgredgiedg 16517 |
| Copyright terms: Public domain | W3C validator |