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| Description: The converse of a restriction of a function. |
| Ref | Expression |
|---|---|
| fcnvres |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | visset 2295 |
. . . . . . . . 9
| |
| 2 | 1 | opelf 4579 |
. . . . . . . 8
|
| 3 | 2 | simplld 348 |
. . . . . . 7
|
| 4 | 3 | ex 402 |
. . . . . 6
|
| 5 | pm4.71 697 |
. . . . . 6
| |
| 6 | 4, 5 | sylib 215 |
. . . . 5
|
| 7 | visset 2295 |
. . . . . . 7
| |
| 8 | 1, 7 | opelcnv 4143 |
. . . . . 6
|
| 9 | 1 | opelres 4222 |
. . . . . 6
|
| 10 | 8, 9 | bitri 190 |
. . . . 5
|
| 11 | 6, 10 | syl6bbr 597 |
. . . 4
|
| 12 | 2 | simprd 352 |
. . . . . . 7
|
| 13 | 12 | ex 402 |
. . . . . 6
|
| 14 | pm4.71 697 |
. . . . . 6
| |
| 15 | 13, 14 | sylib 215 |
. . . . 5
|
| 16 | 7 | opelres 4222 |
. . . . . 6
|
| 17 | 1, 7 | opelcnv 4143 |
. . . . . . 7
|
| 18 | 17 | anbi1i 539 |
. . . . . 6
|
| 19 | 16, 18 | bitri 190 |
. . . . 5
|
| 20 | 15, 19 | syl6bbr 597 |
. . . 4
|
| 21 | 11, 20 | bitr3d 589 |
. . 3
|
| 22 | 21 | 19.21aivv 1665 |
. 2
|
| 23 | relcnv 4301 |
. . 3
| |
| 24 | relres 4242 |
. . 3
| |
| 25 | eqrel 4077 |
. . 3
| |
| 26 | 23, 24, 25 | mp2an 761 |
. 2
|
| 27 | 22, 26 | sylibr 217 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-br 3339 df-opab 3396 df-xp 4000 df-rel 4001 df-cnv 4002 df-dm 4004 df-rn 4005 df-res 4006 df-fun 4008 df-fn 4009 df-f 4010 |