| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > cofunex2g | Unicode version | ||
| Description: Existence of a composition when the second member is one-to-one. (Contributed by NM, 8-Oct-2007.) |
| Ref | Expression |
|---|---|
| cofunex2g |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvexg 5320 |
. . . 4
| |
| 2 | cofunexg 6328 |
. . . 4
| |
| 3 | 1, 2 | sylan2 286 |
. . 3
|
| 4 | cnvco 4960 |
. . . . 5
| |
| 5 | cocnvcnv2 5294 |
. . . . 5
| |
| 6 | cocnvcnv1 5293 |
. . . . 5
| |
| 7 | 4, 5, 6 | 3eqtrri 2264 |
. . . 4
|
| 8 | cnvexg 5320 |
. . . 4
| |
| 9 | 7, 8 | eqeltrid 2325 |
. . 3
|
| 10 | 3, 9 | syl 14 |
. 2
|
| 11 | 10 | ancoms 268 |
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 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4241 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-iun 4009 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-ima 4782 df-iota 5332 df-fun 5374 df-fn 5375 df-f 5376 df-f1 5377 df-fo 5378 df-f1o 5379 df-fv 5380 |
| This theorem is referenced by: fsuppcorn 7291 |
| Copyright terms: Public domain | W3C validator |