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Related theorems Unicode version |
| Description: Membership in two functions restricted by each other's domain. |
| Ref | Expression |
|---|---|
| 2elresin |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnop 3583 |
. . . . . . 7
| |
| 2 | fnop 3583 |
. . . . . . 7
| |
| 3 | 1, 2 | anim12i 333 |
. . . . . 6
|
| 4 | an4 506 |
. . . . . 6
| |
| 5 | elin 2203 |
. . . . . 6
| |
| 6 | 3, 4, 5 | 3imtr4 219 |
. . . . 5
|
| 7 | visset 1809 |
. . . . . . . 8
| |
| 8 | 7 | opres 3367 |
. . . . . . 7
|
| 9 | visset 1809 |
. . . . . . . 8
| |
| 10 | 9 | opres 3367 |
. . . . . . 7
|
| 11 | 8, 10 | anbi12d 627 |
. . . . . 6
|
| 12 | 11 | biimprd 154 |
. . . . 5
|
| 13 | 6, 12 | syl 10 |
. . . 4
|
| 14 | 13 | ex 373 |
. . 3
|
| 15 | 14 | pm2.43d 65 |
. 2
|
| 16 | resss 3375 |
. . . 4
| |
| 17 | 16 | sseli 2061 |
. . 3
|
| 18 | resss 3375 |
. . . 4
| |
| 19 | 18 | sseli 2061 |
. . 3
|
| 20 | 17, 19 | anim12i 333 |
. 2
|
| 21 | 15, 20 | impbid1 516 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: tfrlem5 3906 |
| 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-xp 3179 df-rel 3180 df-dm 3183 df-res 3185 df-fun 3187 df-fn 3188 |