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Mirrors > Home > ILE Home > Th. List > cofunexg | Unicode version |
Description: Existence of a composition when the first member is a function. (Contributed by NM, 8-Oct-2007.) |
Ref | Expression |
---|---|
cofunexg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relco 5007 | . . 3 | |
2 | relssdmrn 5029 | . . 3 | |
3 | 1, 2 | ax-mp 5 | . 2 |
4 | dmcoss 4778 | . . . . 5 | |
5 | dmexg 4773 | . . . . 5 | |
6 | ssexg 4037 | . . . . 5 | |
7 | 4, 5, 6 | sylancr 410 | . . . 4 |
8 | 7 | adantl 275 | . . 3 |
9 | rnco 5015 | . . . 4 | |
10 | rnexg 4774 | . . . . . 6 | |
11 | resfunexg 5609 | . . . . . 6 | |
12 | 10, 11 | sylan2 284 | . . . . 5 |
13 | rnexg 4774 | . . . . 5 | |
14 | 12, 13 | syl 14 | . . . 4 |
15 | 9, 14 | eqeltrid 2204 | . . 3 |
16 | xpexg 4623 | . . 3 | |
17 | 8, 15, 16 | syl2anc 408 | . 2 |
18 | ssexg 4037 | . 2 | |
19 | 3, 17, 18 | sylancr 410 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wcel 1465 cvv 2660 wss 3041 cxp 4507 cdm 4509 crn 4510 cres 4511 ccom 4513 wrel 4514 wfun 5087 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 683 ax-5 1408 ax-7 1409 ax-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-8 1467 ax-10 1468 ax-11 1469 ax-i12 1470 ax-bndl 1471 ax-4 1472 ax-13 1476 ax-14 1477 ax-17 1491 ax-i9 1495 ax-ial 1499 ax-i5r 1500 ax-ext 2099 ax-coll 4013 ax-sep 4016 ax-pow 4068 ax-pr 4101 ax-un 4325 |
This theorem depends on definitions: df-bi 116 df-3an 949 df-tru 1319 df-nf 1422 df-sb 1721 df-eu 1980 df-mo 1981 df-clab 2104 df-cleq 2110 df-clel 2113 df-nfc 2247 df-ral 2398 df-rex 2399 df-reu 2400 df-rab 2402 df-v 2662 df-sbc 2883 df-csb 2976 df-un 3045 df-in 3047 df-ss 3054 df-pw 3482 df-sn 3503 df-pr 3504 df-op 3506 df-uni 3707 df-iun 3785 df-br 3900 df-opab 3960 df-mpt 3961 df-id 4185 df-xp 4515 df-rel 4516 df-cnv 4517 df-co 4518 df-dm 4519 df-rn 4520 df-res 4521 df-ima 4522 df-iota 5058 df-fun 5095 df-fn 5096 df-f 5097 df-f1 5098 df-fo 5099 df-f1o 5100 df-fv 5101 |
This theorem is referenced by: cofunex2g 5978 ctm 6962 ctssdclemr 6965 |
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