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| Description: Alternate definition of a one-to-one function. |
| Ref | Expression |
|---|---|
| f11 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-f1 3190 |
. 2
| |
| 2 | dffunmo 3523 |
. . . . 5
| |
| 3 | relcnv 3427 |
. . . . 5
| |
| 4 | 2, 3 | mpbiran 727 |
. . . 4
|
| 5 | visset 1809 |
. . . . . . 7
| |
| 6 | visset 1809 |
. . . . . . 7
| |
| 7 | 5, 6 | brcnv 3294 |
. . . . . 6
|
| 8 | 7 | mobii 1403 |
. . . . 5
|
| 9 | 8 | albii 997 |
. . . 4
|
| 10 | 4, 9 | bitr 173 |
. . 3
|
| 11 | 10 | anbi2i 480 |
. 2
|
| 12 | 1, 11 | bitr 173 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: f1fv 3865 |
| 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-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-fun 3187 df-f1 3190 |