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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 7581 | . 2 ⊢ ∅ ∈ ω | |
2 | ssid 3937 | . 2 ⊢ ∅ ⊆ ∅ | |
3 | ssnnfi 8721 | . 2 ⊢ ((∅ ∈ ω ∧ ∅ ⊆ ∅) → ∅ ∈ Fin) | |
4 | 1, 2, 3 | mp2an 691 | 1 ⊢ ∅ ∈ Fin |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2111 ⊆ wss 3881 ∅c0 4243 ωcom 7560 Fincfn 8492 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-om 7561 df-en 8493 df-fin 8496 |
This theorem is referenced by: nfielex 8731 xpfi 8773 fnfi 8780 iunfi 8796 fczfsuppd 8835 fsuppun 8836 0fsupp 8839 r1fin 9186 acndom 9462 numwdom 9470 ackbij1lem18 9648 sdom2en01 9713 fin23lem26 9736 isfin1-3 9797 gchxpidm 10080 fzfi 13335 fzofi 13337 hasheq0 13720 hashxp 13791 lcmf0 15968 0hashbc 16333 acsfn0 16923 isdrs2 17541 fpwipodrs 17766 symgfisg 18588 dsmm0cl 20429 mplsubg 20675 mpllss 20676 psrbag0 20733 mat0dimbas0 21071 mat0dim0 21072 mat0dimid 21073 mat0dimscm 21074 mat0dimcrng 21075 mat0scmat 21143 mavmul0 21157 mavmul0g 21158 mdet0pr 21197 m1detdiag 21202 d0mat2pmat 21343 chpmat0d 21439 fctop 21609 cmpfi 22013 bwth 22015 comppfsc 22137 ptbasid 22180 cfinfil 22498 ufinffr 22534 fin1aufil 22537 alexsubALTlem2 22653 alexsubALTlem4 22655 ptcmplem2 22658 tsmsfbas 22733 xrge0gsumle 23438 xrge0tsms 23439 fta1 24904 uhgr0edgfi 27030 fusgrfisbase 27118 vtxdg0e 27264 wwlksnfi 27692 hashxpe 30555 xrge0tsmsd 30742 esumnul 31417 esum0 31418 esumcst 31432 esumsnf 31433 esumpcvgval 31447 sibf0 31702 eulerpartlemt 31739 derang0 32529 topdifinffinlem 34764 matunitlindf 35055 0totbnd 35211 heiborlem6 35254 mzpcompact2lem 39692 rp-isfinite6 40226 0pwfi 41693 fouriercn 42874 rrxtopn0 42935 salexct 42974 sge0rnn0 43007 sge00 43015 sge0sn 43018 ovn0val 43189 ovn02 43207 hoidmv0val 43222 hoidmvle 43239 hoiqssbl 43264 von0val 43310 vonhoire 43311 vonioo 43321 vonicc 43324 vonsn 43330 lcoc0 44831 lco0 44836 |
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