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Mirrors > Home > MPE Home > Th. List > 0fin | Structured version Visualization version GIF version |
Description: The empty set is finite. (Contributed by FL, 14-Jul-2008.) |
Ref | Expression |
---|---|
0fin | ⊢ ∅ ∈ Fin |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | peano1 7595 | . 2 ⊢ ∅ ∈ ω | |
2 | ssid 3989 | . 2 ⊢ ∅ ⊆ ∅ | |
3 | ssnnfi 8731 | . 2 ⊢ ((∅ ∈ ω ∧ ∅ ⊆ ∅) → ∅ ∈ Fin) | |
4 | 1, 2, 3 | mp2an 690 | 1 ⊢ ∅ ∈ Fin |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2110 ⊆ wss 3936 ∅c0 4291 ωcom 7574 Fincfn 8503 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-om 7575 df-en 8504 df-fin 8507 |
This theorem is referenced by: nfielex 8741 xpfi 8783 fnfi 8790 iunfi 8806 fczfsuppd 8845 fsuppun 8846 0fsupp 8849 r1fin 9196 acndom 9471 numwdom 9479 ackbij1lem18 9653 sdom2en01 9718 fin23lem26 9741 isfin1-3 9802 gchxpidm 10085 fzfi 13334 fzofi 13336 hasheq0 13718 hashxp 13789 lcmf0 15972 0hashbc 16337 acsfn0 16925 isdrs2 17543 fpwipodrs 17768 symgfisg 18590 mplsubg 20211 mpllss 20212 psrbag0 20268 dsmm0cl 20878 mat0dimbas0 21069 mat0dim0 21070 mat0dimid 21071 mat0dimscm 21072 mat0dimcrng 21073 mat0scmat 21141 mavmul0 21155 mavmul0g 21156 mdet0pr 21195 m1detdiag 21200 d0mat2pmat 21340 chpmat0d 21436 fctop 21606 cmpfi 22010 bwth 22012 comppfsc 22134 ptbasid 22177 cfinfil 22495 ufinffr 22531 fin1aufil 22534 alexsubALTlem2 22650 alexsubALTlem4 22652 ptcmplem2 22655 tsmsfbas 22730 xrge0gsumle 23435 xrge0tsms 23436 fta1 24891 uhgr0edgfi 27016 fusgrfisbase 27104 vtxdg0e 27250 wwlksnfi 27678 wwlksnfiOLD 27679 clwwlknfiOLD 27818 hashxpe 30523 xrge0tsmsd 30687 esumnul 31302 esum0 31303 esumcst 31317 esumsnf 31318 esumpcvgval 31332 sibf0 31587 eulerpartlemt 31624 derang0 32411 topdifinffinlem 34622 matunitlindf 34884 0totbnd 35045 heiborlem6 35088 mzpcompact2lem 39341 rp-isfinite6 39877 0pwfi 41314 fouriercn 42510 rrxtopn0 42571 salexct 42610 sge0rnn0 42643 sge00 42651 sge0sn 42654 ovn0val 42825 ovn02 42843 hoidmv0val 42858 hoidmvle 42875 hoiqssbl 42900 von0val 42946 vonhoire 42947 vonioo 42957 vonicc 42960 vonsn 42966 lcoc0 44470 lco0 44475 |
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