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Mirrors > Home > ILE Home > Th. List > cc1 | Unicode version |
Description: Countable choice in terms of a choice function on a countably infinite set of inhabited sets. (Contributed by Jim Kingdon, 27-Apr-2024.) |
Ref | Expression |
---|---|
cc1 | CCHOICE |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 108 | . . . . . 6 CCHOICE CCHOICE | |
2 | simprl 520 | . . . . . 6 CCHOICE | |
3 | simprr 521 | . . . . . . 7 CCHOICE | |
4 | elequ2 1691 | . . . . . . . . 9 | |
5 | 4 | exbidv 1797 | . . . . . . . 8 |
6 | 5 | cbvralvw 2658 | . . . . . . 7 |
7 | 3, 6 | sylib 121 | . . . . . 6 CCHOICE |
8 | 1, 2, 7 | ccfunen 7079 | . . . . 5 CCHOICE |
9 | exsimpr 1597 | . . . . 5 | |
10 | 8, 9 | syl 14 | . . . 4 CCHOICE |
11 | fveq2 5421 | . . . . . . 7 | |
12 | id 19 | . . . . . . 7 | |
13 | 11, 12 | eleq12d 2210 | . . . . . 6 |
14 | 13 | cbvralvw 2658 | . . . . 5 |
15 | 14 | exbii 1584 | . . . 4 |
16 | 10, 15 | sylib 121 | . . 3 CCHOICE |
17 | 16 | ex 114 | . 2 CCHOICE |
18 | 17 | alrimiv 1846 | 1 CCHOICE |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wal 1329 wex 1468 wcel 1480 wral 2416 class class class wbr 3929 com 4504 wfn 5118 cfv 5123 cen 6632 CCHOICEwacc 7077 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-coll 4043 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-reu 2423 df-rab 2425 df-v 2688 df-sbc 2910 df-csb 3004 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-iun 3815 df-br 3930 df-opab 3990 df-mpt 3991 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-rn 4550 df-res 4551 df-ima 4552 df-iota 5088 df-fun 5125 df-fn 5126 df-f 5127 df-f1 5128 df-fo 5129 df-f1o 5130 df-fv 5131 df-en 6635 df-cc 7078 |
This theorem is referenced by: (None) |
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