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Mirrors > Home > ILE Home > Th. List > ssfiexmid | Unicode version |
Description: If any subset of a finite set is finite, excluded middle follows. One direction of Theorem 2.1 of [Bauer], p. 485. (Contributed by Jim Kingdon, 19-May-2020.) |
Ref | Expression |
---|---|
ssfiexmid.1 |
Ref | Expression |
---|---|
ssfiexmid |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0ex 4103 | . . . 4 | |
2 | snfig 6771 | . . . 4 | |
3 | 1, 2 | ax-mp 5 | . . 3 |
4 | ssrab2 3222 | . . 3 | |
5 | ssfiexmid.1 | . . . . 5 | |
6 | p0ex 4161 | . . . . . 6 | |
7 | eleq1 2227 | . . . . . . . . 9 | |
8 | sseq2 3161 | . . . . . . . . 9 | |
9 | 7, 8 | anbi12d 465 | . . . . . . . 8 |
10 | 9 | imbi1d 230 | . . . . . . 7 |
11 | 10 | albidv 1811 | . . . . . 6 |
12 | 6, 11 | spcv 2815 | . . . . 5 |
13 | 5, 12 | ax-mp 5 | . . . 4 |
14 | 6 | rabex 4120 | . . . . 5 |
15 | sseq1 3160 | . . . . . . 7 | |
16 | 15 | anbi2d 460 | . . . . . 6 |
17 | eleq1 2227 | . . . . . 6 | |
18 | 16, 17 | imbi12d 233 | . . . . 5 |
19 | 14, 18 | spcv 2815 | . . . 4 |
20 | 13, 19 | ax-mp 5 | . . 3 |
21 | 3, 4, 20 | mp2an 423 | . 2 |
22 | 21 | ssfilem 6832 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wo 698 wal 1340 wceq 1342 wcel 2135 crab 2446 cvv 2721 wss 3111 c0 3404 csn 3570 cfn 6697 |
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-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-nul 4102 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-iinf 4559 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-rab 2451 df-v 2723 df-sbc 2947 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-nul 3405 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-int 3819 df-br 3977 df-opab 4038 df-id 4265 df-suc 4343 df-iom 4562 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-f1 5187 df-fo 5188 df-f1o 5189 df-fv 5190 df-1o 6375 df-er 6492 df-en 6698 df-fin 6700 |
This theorem is referenced by: infiexmid 6834 |
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