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Mirrors > Home > MPE Home > Th. List > isfinite2 | Structured version Visualization version Unicode version |
Description: Any set strictly dominated by the class of natural numbers is finite. Sufficiency part of Theorem 42 of [Suppes] p. 151. This theorem does not require the Axiom of Infinity. (Contributed by NM, 24-Apr-2004.) |
Ref | Expression |
---|---|
isfinite2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relsdom 7962 | . . 3 | |
2 | 1 | brrelex2i 5159 | . 2 |
3 | sdomdom 7983 | . . . 4 | |
4 | domeng 7969 | . . . 4 | |
5 | 3, 4 | syl5ib 234 | . . 3 |
6 | ensym 8005 | . . . . . . . . . . 11 | |
7 | 6 | ad2antrl 764 | . . . . . . . . . 10 |
8 | simpl 473 | . . . . . . . . . 10 | |
9 | ensdomtr 8096 | . . . . . . . . . 10 | |
10 | 7, 8, 9 | syl2anc 693 | . . . . . . . . 9 |
11 | sdomnen 7984 | . . . . . . . . 9 | |
12 | 10, 11 | syl 17 | . . . . . . . 8 |
13 | simpr 477 | . . . . . . . . 9 | |
14 | unbnn 8216 | . . . . . . . . . 10 | |
15 | 14 | 3expia 1267 | . . . . . . . . 9 |
16 | 2, 13, 15 | syl2an 494 | . . . . . . . 8 |
17 | 12, 16 | mtod 189 | . . . . . . 7 |
18 | rexnal 2995 | . . . . . . . . 9 | |
19 | omsson 7069 | . . . . . . . . . . . . 13 | |
20 | sstr 3611 | . . . . . . . . . . . . 13 | |
21 | 19, 20 | mpan2 707 | . . . . . . . . . . . 12 |
22 | nnord 7073 | . . . . . . . . . . . 12 | |
23 | ssel2 3598 | . . . . . . . . . . . . . . . . . 18 | |
24 | vex 3203 | . . . . . . . . . . . . . . . . . . 19 | |
25 | 24 | elon 5732 | . . . . . . . . . . . . . . . . . 18 |
26 | 23, 25 | sylib 208 | . . . . . . . . . . . . . . . . 17 |
27 | ordtri1 5756 | . . . . . . . . . . . . . . . . 17 | |
28 | 26, 27 | sylan 488 | . . . . . . . . . . . . . . . 16 |
29 | 28 | an32s 846 | . . . . . . . . . . . . . . 15 |
30 | 29 | ralbidva 2985 | . . . . . . . . . . . . . 14 |
31 | unissb 4469 | . . . . . . . . . . . . . 14 | |
32 | ralnex 2992 | . . . . . . . . . . . . . . 15 | |
33 | 32 | bicomi 214 | . . . . . . . . . . . . . 14 |
34 | 30, 31, 33 | 3bitr4g 303 | . . . . . . . . . . . . 13 |
35 | ordunisssuc 5830 | . . . . . . . . . . . . 13 | |
36 | 34, 35 | bitr3d 270 | . . . . . . . . . . . 12 |
37 | 21, 22, 36 | syl2an 494 | . . . . . . . . . . 11 |
38 | peano2b 7081 | . . . . . . . . . . . . . 14 | |
39 | ssnnfi 8179 | . . . . . . . . . . . . . 14 | |
40 | 38, 39 | sylanb 489 | . . . . . . . . . . . . 13 |
41 | 40 | ex 450 | . . . . . . . . . . . 12 |
42 | 41 | adantl 482 | . . . . . . . . . . 11 |
43 | 37, 42 | sylbid 230 | . . . . . . . . . 10 |
44 | 43 | rexlimdva 3031 | . . . . . . . . 9 |
45 | 18, 44 | syl5bir 233 | . . . . . . . 8 |
46 | 45 | ad2antll 765 | . . . . . . 7 |
47 | 17, 46 | mpd 15 | . . . . . 6 |
48 | simprl 794 | . . . . . 6 | |
49 | enfii 8177 | . . . . . 6 | |
50 | 47, 48, 49 | syl2anc 693 | . . . . 5 |
51 | 50 | ex 450 | . . . 4 |
52 | 51 | exlimdv 1861 | . . 3 |
53 | 5, 52 | sylcom 30 | . 2 |
54 | 2, 53 | mpcom 38 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wb 196 wa 384 wex 1704 wcel 1990 wral 2912 wrex 2913 cvv 3200 wss 3574 cuni 4436 class class class wbr 4653 word 5722 con0 5723 csuc 5725 com 7065 cen 7952 cdom 7953 csdm 7954 cfn 7955 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-om 7066 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 |
This theorem is referenced by: isfiniteg 8220 unfi2 8229 unifi2 8256 axcclem 9279 dirith2 25217 padct 29497 volmeas 30294 axccdom 39416 axccd2 39430 |
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