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| Mirrors > Home > ILE Home > Th. List > fcnvres | Unicode version | ||
| Description: The converse of a restriction of a function. (Contributed by NM, 26-Mar-1998.) |
| Ref | Expression |
|---|---|
| fcnvres |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relcnv 5114 |
. 2
| |
| 2 | relres 5041 |
. 2
| |
| 3 | opelf 5507 |
. . . . . . 7
| |
| 4 | 3 | simpld 112 |
. . . . . 6
|
| 5 | 4 | ex 115 |
. . . . 5
|
| 6 | 5 | pm4.71d 393 |
. . . 4
|
| 7 | vex 2805 |
. . . . . 6
| |
| 8 | vex 2805 |
. . . . . 6
| |
| 9 | 7, 8 | opelcnv 4912 |
. . . . 5
|
| 10 | 7 | opelres 5018 |
. . . . 5
|
| 11 | 9, 10 | bitri 184 |
. . . 4
|
| 12 | 6, 11 | bitr4di 198 |
. . 3
|
| 13 | 3 | simprd 114 |
. . . . . 6
|
| 14 | 13 | ex 115 |
. . . . 5
|
| 15 | 14 | pm4.71d 393 |
. . . 4
|
| 16 | 8 | opelres 5018 |
. . . . 5
|
| 17 | 7, 8 | opelcnv 4912 |
. . . . . 6
|
| 18 | 17 | anbi1i 458 |
. . . . 5
|
| 19 | 16, 18 | bitri 184 |
. . . 4
|
| 20 | 15, 19 | bitr4di 198 |
. . 3
|
| 21 | 12, 20 | bitr3d 190 |
. 2
|
| 22 | 1, 2, 21 | eqrelrdv 4822 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-rel 4732 df-cnv 4733 df-dm 4735 df-rn 4736 df-res 4737 df-fun 5328 df-fn 5329 df-f 5330 |
| This theorem is referenced by: (None) |
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