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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 109 |
. . . . . 6
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2 | simprl 529 |
. . . . . 6
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3 | simprr 531 |
. . . . . . 7
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4 | elequ2 2169 |
. . . . . . . . 9
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5 | 4 | exbidv 1836 |
. . . . . . . 8
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6 | 5 | cbvralvw 2730 |
. . . . . . 7
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7 | 3, 6 | sylib 122 |
. . . . . 6
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8 | 1, 2, 7 | ccfunen 7324 |
. . . . 5
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9 | exsimpr 1629 |
. . . . 5
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10 | 8, 9 | syl 14 |
. . . 4
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11 | fveq2 5554 |
. . . . . . 7
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12 | id 19 |
. . . . . . 7
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13 | 11, 12 | eleq12d 2264 |
. . . . . 6
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14 | 13 | cbvralvw 2730 |
. . . . 5
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15 | 14 | exbii 1616 |
. . . 4
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16 | 10, 15 | sylib 122 |
. . 3
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17 | 16 | ex 115 |
. 2
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18 | 17 | alrimiv 1885 |
1
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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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4144 ax-sep 4147 ax-pow 4203 ax-pr 4238 ax-un 4464 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-reu 2479 df-rab 2481 df-v 2762 df-sbc 2986 df-csb 3081 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-iun 3914 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-res 4671 df-ima 4672 df-iota 5215 df-fun 5256 df-fn 5257 df-f 5258 df-f1 5259 df-fo 5260 df-f1o 5261 df-fv 5262 df-en 6795 df-cc 7323 |
This theorem is referenced by: (None) |
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