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| Description: Equality theorem for one-to-one onto functions. |
| Ref | Expression |
|---|---|
| f1oeq1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1eq1 3651 |
. . 3
| |
| 2 | foeq1 3659 |
. . 3
| |
| 3 | 1, 2 | anbi12d 627 |
. 2
|
| 4 | df-f1o 3192 |
. 2
| |
| 5 | df-f1o 3192 |
. 2
| |
| 6 | 3, 4, 5 | 3bitr4g 554 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: f1ocnvb 3693 f1orescnv 3695 f1ovi 3709 fsn 3825 isoeq1 3878 mapsn 4335 enrefg 4377 f1oen2g 4381 ensn1 4411 unen 4420 php3 4501 ssfi 4521 unfilem3 4532 numthlem 4763 icoshftf1olem 6351 unbenlem 7455 infxpidmlem2 7504 shftefif1olem 8680 logrn 8690 eff1o2 8693 logf1o 8694 relogf1o 8696 hoif 9620 elgiso 10332 elsymgrn 10335 ishomeo 10440 homcard 10462 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-br 2615 df-opab 2662 df-id 2830 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-fun 3187 df-fn 3188 df-f 3189 df-f1 3190 df-fo 3191 df-f1o 3192 |