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Mirrors > Home > ILE Home > Th. List > fihashf1rn | Unicode version |
Description: The size of a finite set which is a one-to-one function is equal to the size of the function's range. (Contributed by Jim Kingdon, 21-Feb-2022.) |
Ref | Expression |
---|---|
fihashf1rn | ♯ ♯ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1fn 5325 | . . 3 | |
2 | simpl 108 | . . 3 | |
3 | fnfi 6818 | . . 3 | |
4 | 1, 2, 3 | syl2an2 583 | . 2 |
5 | f1o2ndf1 6118 | . . . 4 | |
6 | df-2nd 6032 | . . . . . . . . 9 | |
7 | 6 | funmpt2 5157 | . . . . . . . 8 |
8 | f1f 5323 | . . . . . . . . . . 11 | |
9 | 8 | anim2i 339 | . . . . . . . . . 10 |
10 | 9 | ancomd 265 | . . . . . . . . 9 |
11 | fex 5640 | . . . . . . . . 9 | |
12 | 10, 11 | syl 14 | . . . . . . . 8 |
13 | resfunexg 5634 | . . . . . . . 8 | |
14 | 7, 12, 13 | sylancr 410 | . . . . . . 7 |
15 | f1oeq1 5351 | . . . . . . . . . 10 | |
16 | 15 | biimpd 143 | . . . . . . . . 9 |
17 | 16 | eqcoms 2140 | . . . . . . . 8 |
18 | 17 | adantl 275 | . . . . . . 7 |
19 | 14, 18 | spcimedv 2767 | . . . . . 6 |
20 | 19 | ex 114 | . . . . 5 |
21 | 20 | com13 80 | . . . 4 |
22 | 5, 21 | mpcom 36 | . . 3 |
23 | 22 | impcom 124 | . 2 |
24 | fihasheqf1oi 10527 | . . . 4 ♯ ♯ | |
25 | 24 | ex 114 | . . 3 ♯ ♯ |
26 | 25 | exlimdv 1791 | . 2 ♯ ♯ |
27 | 4, 23, 26 | sylc 62 | 1 ♯ ♯ |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1331 wex 1468 wcel 1480 cvv 2681 csn 3522 cuni 3731 crn 4535 cres 4536 wfun 5112 wfn 5113 wf 5114 wf1 5115 wf1o 5117 cfv 5118 c2nd 6030 cfn 6627 ♯chash 10514 |
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 2119 ax-coll 4038 ax-sep 4041 ax-nul 4049 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-setind 4447 ax-iinf 4497 ax-cnex 7704 ax-resscn 7705 ax-1cn 7706 ax-1re 7707 ax-icn 7708 ax-addcl 7709 ax-addrcl 7710 ax-mulcl 7711 ax-addcom 7713 ax-addass 7715 ax-distr 7717 ax-i2m1 7718 ax-0lt1 7719 ax-0id 7721 ax-rnegex 7722 ax-cnre 7724 ax-pre-ltirr 7725 ax-pre-ltwlin 7726 ax-pre-lttrn 7727 ax-pre-ltadd 7729 |
This theorem depends on definitions: df-bi 116 df-dc 820 df-3or 963 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-rex 2420 df-reu 2421 df-rab 2423 df-v 2683 df-sbc 2905 df-csb 2999 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-nul 3359 df-if 3470 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-int 3767 df-iun 3810 df-br 3925 df-opab 3985 df-mpt 3986 df-tr 4022 df-id 4210 df-iord 4283 df-on 4285 df-ilim 4286 df-suc 4288 df-iom 4500 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-iota 5083 df-fun 5120 df-fn 5121 df-f 5122 df-f1 5123 df-fo 5124 df-f1o 5125 df-fv 5126 df-riota 5723 df-ov 5770 df-oprab 5771 df-mpo 5772 df-2nd 6032 df-recs 6195 df-frec 6281 df-1o 6306 df-er 6422 df-en 6628 df-dom 6629 df-fin 6630 df-pnf 7795 df-mnf 7796 df-xr 7797 df-ltxr 7798 df-le 7799 df-sub 7928 df-neg 7929 df-inn 8714 df-n0 8971 df-z 9048 df-uz 9320 df-ihash 10515 |
This theorem is referenced by: (None) |
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