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Mirrors > Home > ILE Home > Th. List > qnnen | Unicode version |
Description: The rational numbers are countably infinite. Corollary 8.1.23 of [AczelRathjen], p. 75. This is Metamath 100 proof #3. (Contributed by Jim Kingdon, 11-Aug-2023.) |
Ref | Expression |
---|---|
qnnen |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | qdceq 10024 | . . 3 DECID | |
2 | 1 | rgen2a 2486 | . 2 DECID |
3 | znnen 11911 | . . . . . . . 8 | |
4 | nnex 8726 | . . . . . . . . 9 | |
5 | 4 | enref 6659 | . . . . . . . 8 |
6 | xpen 6739 | . . . . . . . 8 | |
7 | 3, 5, 6 | mp2an 422 | . . . . . . 7 |
8 | xpnnen 11907 | . . . . . . 7 | |
9 | 7, 8 | entri 6680 | . . . . . 6 |
10 | nnenom 10207 | . . . . . 6 | |
11 | 9, 10 | entri 6680 | . . . . 5 |
12 | 11 | ensymi 6676 | . . . 4 |
13 | bren 6641 | . . . 4 | |
14 | 12, 13 | mpbi 144 | . . 3 |
15 | f1ofo 5374 | . . . . 5 | |
16 | divfnzn 9413 | . . . . . . . . 9 | |
17 | fnfun 5220 | . . . . . . . . 9 | |
18 | 16, 17 | ax-mp 5 | . . . . . . . 8 |
19 | fndm 5222 | . . . . . . . . 9 | |
20 | eqimss2 3152 | . . . . . . . . 9 | |
21 | 16, 19, 20 | mp2b 8 | . . . . . . . 8 |
22 | fores 5354 | . . . . . . . 8 | |
23 | 18, 21, 22 | mp2an 422 | . . . . . . 7 |
24 | resima 4852 | . . . . . . . . 9 | |
25 | df-q 9412 | . . . . . . . . 9 | |
26 | 24, 25 | eqtr4i 2163 | . . . . . . . 8 |
27 | foeq3 5343 | . . . . . . . 8 | |
28 | 26, 27 | ax-mp 5 | . . . . . . 7 |
29 | 23, 28 | mpbi 144 | . . . . . 6 |
30 | foco 5355 | . . . . . 6 | |
31 | 29, 30 | mpan 420 | . . . . 5 |
32 | zex 9063 | . . . . . . . . 9 | |
33 | 32, 4 | xpex 4654 | . . . . . . . 8 |
34 | resfunexg 5641 | . . . . . . . 8 | |
35 | 18, 33, 34 | mp2an 422 | . . . . . . 7 |
36 | vex 2689 | . . . . . . 7 | |
37 | 35, 36 | coex 5084 | . . . . . 6 |
38 | foeq1 5341 | . . . . . 6 | |
39 | 37, 38 | spcev 2780 | . . . . 5 |
40 | 15, 31, 39 | 3syl 17 | . . . 4 |
41 | 40 | exlimiv 1577 | . . 3 |
42 | 14, 41 | ax-mp 5 | . 2 |
43 | 10 | ensymi 6676 | . . 3 |
44 | qex 9424 | . . . 4 | |
45 | nnssq 9421 | . . . 4 | |
46 | ssdomg 6672 | . . . 4 | |
47 | 44, 45, 46 | mp2 16 | . . 3 |
48 | endomtr 6684 | . . 3 | |
49 | 43, 47, 48 | mp2an 422 | . 2 |
50 | ctinf 11943 | . 2 DECID | |
51 | 2, 42, 49, 50 | mpbir3an 1163 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 DECID wdc 819 wceq 1331 wex 1468 wcel 1480 wral 2416 cvv 2686 wss 3071 class class class wbr 3929 com 4504 cxp 4537 cdm 4539 cres 4541 cima 4542 ccom 4543 wfun 5117 wfn 5118 wfo 5121 wf1o 5122 cen 6632 cdom 6633 cdiv 8432 cn 8720 cz 9054 cq 9411 |
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 603 ax-in2 604 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-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-iinf 4502 ax-cnex 7711 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-mulrcl 7719 ax-addcom 7720 ax-mulcom 7721 ax-addass 7722 ax-mulass 7723 ax-distr 7724 ax-i2m1 7725 ax-0lt1 7726 ax-1rid 7727 ax-0id 7728 ax-rnegex 7729 ax-precex 7730 ax-cnre 7731 ax-pre-ltirr 7732 ax-pre-ltwlin 7733 ax-pre-lttrn 7734 ax-pre-apti 7735 ax-pre-ltadd 7736 ax-pre-mulgt0 7737 ax-pre-mulext 7738 ax-arch 7739 |
This theorem depends on definitions: df-bi 116 df-dc 820 df-3or 963 df-3an 964 df-tru 1334 df-fal 1337 df-xor 1354 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-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-reu 2423 df-rmo 2424 df-rab 2425 df-v 2688 df-sbc 2910 df-csb 3004 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-if 3475 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-iun 3815 df-br 3930 df-opab 3990 df-mpt 3991 df-tr 4027 df-id 4215 df-po 4218 df-iso 4219 df-iord 4288 df-on 4290 df-ilim 4291 df-suc 4293 df-iom 4505 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-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-1st 6038 df-2nd 6039 df-recs 6202 df-frec 6288 df-1o 6313 df-er 6429 df-pm 6545 df-en 6635 df-dom 6636 df-fin 6637 df-dju 6923 df-inl 6932 df-inr 6933 df-case 6969 df-pnf 7802 df-mnf 7803 df-xr 7804 df-ltxr 7805 df-le 7806 df-sub 7935 df-neg 7936 df-reap 8337 df-ap 8344 df-div 8433 df-inn 8721 df-2 8779 df-n0 8978 df-z 9055 df-uz 9327 df-q 9412 df-rp 9442 df-fz 9791 df-fl 10043 df-mod 10096 df-seqfrec 10219 df-exp 10293 df-dvds 11494 |
This theorem is referenced by: (None) |
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