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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 3884 | . . . . 5 | |
2 | snfig 6291 | . . . . 5 | |
3 | 1, 2 | ax-mp 7 | . . . 4 |
4 | ssrab2 3025 | . . . 4 | |
5 | ssfiexmid.1 | . . . . . 6 | |
6 | p0ex 3939 | . . . . . . 7 | |
7 | eleq1 2100 | . . . . . . . . . 10 | |
8 | sseq2 2967 | . . . . . . . . . 10 | |
9 | 7, 8 | anbi12d 442 | . . . . . . . . 9 |
10 | 9 | imbi1d 220 | . . . . . . . 8 |
11 | 10 | albidv 1705 | . . . . . . 7 |
12 | 6, 11 | spcv 2646 | . . . . . 6 |
13 | 5, 12 | ax-mp 7 | . . . . 5 |
14 | 6 | rabex 3901 | . . . . . 6 |
15 | sseq1 2966 | . . . . . . . 8 | |
16 | 15 | anbi2d 437 | . . . . . . 7 |
17 | eleq1 2100 | . . . . . . 7 | |
18 | 16, 17 | imbi12d 223 | . . . . . 6 |
19 | 14, 18 | spcv 2646 | . . . . 5 |
20 | 13, 19 | ax-mp 7 | . . . 4 |
21 | 3, 4, 20 | mp2an 402 | . . 3 |
22 | isfi 6241 | . . 3 | |
23 | 21, 22 | mpbi 133 | . 2 |
24 | 0elnn 4340 | . . . . 5 | |
25 | breq2 3768 | . . . . . . . . . 10 | |
26 | en0 6275 | . . . . . . . . . 10 | |
27 | 25, 26 | syl6bb 185 | . . . . . . . . 9 |
28 | 27 | biimpac 282 | . . . . . . . 8 |
29 | rabeq0 3247 | . . . . . . . . 9 | |
30 | 1 | snm 3488 | . . . . . . . . . 10 |
31 | r19.3rmv 3312 | . . . . . . . . . 10 | |
32 | 30, 31 | ax-mp 7 | . . . . . . . . 9 |
33 | 29, 32 | bitr4i 176 | . . . . . . . 8 |
34 | 28, 33 | sylib 127 | . . . . . . 7 |
35 | 34 | olcd 653 | . . . . . 6 |
36 | ensym 6261 | . . . . . . . 8 | |
37 | elex2 2570 | . . . . . . . 8 | |
38 | enm 6294 | . . . . . . . 8 | |
39 | 36, 37, 38 | syl2an 273 | . . . . . . 7 |
40 | biidd 161 | . . . . . . . . . . 11 | |
41 | 40 | elrab 2698 | . . . . . . . . . 10 |
42 | 41 | simprbi 260 | . . . . . . . . 9 |
43 | 42 | orcd 652 | . . . . . . . 8 |
44 | 43 | exlimiv 1489 | . . . . . . 7 |
45 | 39, 44 | syl 14 | . . . . . 6 |
46 | 35, 45 | jaodan 710 | . . . . 5 |
47 | 24, 46 | sylan2 270 | . . . 4 |
48 | 47 | ancoms 255 | . . 3 |
49 | 48 | rexlimiva 2428 | . 2 |
50 | 23, 49 | ax-mp 7 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 97 wb 98 wo 629 wal 1241 wceq 1243 wex 1381 wcel 1393 wral 2306 wrex 2307 crab 2310 cvv 2557 wss 2917 c0 3224 csn 3375 class class class wbr 3764 com 4313 cen 6219 cfn 6221 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-nul 3883 ax-pow 3927 ax-pr 3944 ax-un 4170 ax-iinf 4311 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-fal 1249 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-rab 2315 df-v 2559 df-sbc 2765 df-dif 2920 df-un 2922 df-in 2924 df-ss 2931 df-nul 3225 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-int 3616 df-br 3765 df-opab 3819 df-id 4030 df-suc 4108 df-iom 4314 df-xp 4351 df-rel 4352 df-cnv 4353 df-co 4354 df-dm 4355 df-rn 4356 df-res 4357 df-ima 4358 df-iota 4867 df-fun 4904 df-fn 4905 df-f 4906 df-f1 4907 df-fo 4908 df-f1o 4909 df-fv 4910 df-1o 6001 df-er 6106 df-en 6222 df-fin 6224 |
This theorem is referenced by: (None) |
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