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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 3591 |
. . . . . . 7
| |
| 2 | fnop 3591 |
. . . . . . 7
| |
| 3 | 1, 2 | anim12i 333 |
. . . . . 6
|
| 4 | an4 506 |
. . . . . 6
| |
| 5 | elin 2207 |
. . . . . 6
| |
| 6 | 3, 4, 5 | 3imtr4 219 |
. . . . 5
|
| 7 | visset 1813 |
. . . . . . . 8
| |
| 8 | 7 | opres 3375 |
. . . . . . 7
|
| 9 | visset 1813 |
. . . . . . . 8
| |
| 10 | 9 | opres 3375 |
. . . . . . 7
|
| 11 | 8, 10 | anbi12d 628 |
. . . . . 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 3383 |
. . . 4
| |
| 17 | 16 | sseli 2065 |
. . 3
|
| 18 | resss 3383 |
. . . 4
| |
| 19 | 18 | sseli 2065 |
. . 3
|
| 20 | 17, 19 | anim12i 333 |
. 2
|
| 21 | 15, 20 | impbid1 517 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: tfrlem5 3915 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-br 2620 df-opab 2667 df-xp 3184 df-rel 3185 df-dm 3188 df-res 3190 df-fun 3192 df-fn 3193 |