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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 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 109 |
. . . . . 6
| |
| 2 | simprl 531 |
. . . . . 6
| |
| 3 | simprr 533 |
. . . . . . 7
| |
| 4 | elequ2 2210 |
. . . . . . . . 9
| |
| 5 | 4 | exbidv 1874 |
. . . . . . . 8
|
| 6 | 5 | cbvralvw 2784 |
. . . . . . 7
|
| 7 | 3, 6 | sylib 122 |
. . . . . 6
|
| 8 | 1, 2, 7 | ccfunen 7594 |
. . . . 5
|
| 9 | exsimpr 1667 |
. . . . 5
| |
| 10 | 8, 9 | syl 14 |
. . . 4
|
| 11 | fveq2 5675 |
. . . . . . 7
| |
| 12 | id 19 |
. . . . . . 7
| |
| 13 | 11, 12 | eleq12d 2305 |
. . . . . 6
|
| 14 | 13 | cbvralvw 2784 |
. . . . 5
|
| 15 | 14 | exbii 1654 |
. . . 4
|
| 16 | 10, 15 | sylib 122 |
. . 3
|
| 17 | 16 | ex 115 |
. 2
|
| 18 | 17 | alrimiv 1923 |
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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-en 6989 df-cc 7593 |
| This theorem is referenced by: (None) |
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