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Mirrors > Home > MPE Home > Th. List > dmfi | Structured version Visualization version GIF version |
Description: The domain of a finite set is finite. (Contributed by Mario Carneiro, 24-Sep-2013.) |
Ref | Expression |
---|---|
dmfi | ⊢ (𝐴 ∈ Fin → dom 𝐴 ∈ Fin) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fidomdm 9096 | . 2 ⊢ (𝐴 ∈ Fin → dom 𝐴 ≼ 𝐴) | |
2 | domfi 8975 | . 2 ⊢ ((𝐴 ∈ Fin ∧ dom 𝐴 ≼ 𝐴) → dom 𝐴 ∈ Fin) | |
3 | 1, 2 | mpdan 684 | 1 ⊢ (𝐴 ∈ Fin → dom 𝐴 ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2106 class class class wbr 5074 dom cdm 5589 ≼ cdom 8731 Fincfn 8733 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-om 7713 df-1st 7831 df-2nd 7832 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-fin 8737 |
This theorem is referenced by: fundmfibi 9098 residfi 9100 rnfi 9102 hashfun 14152 hashreshashfun 14154 psgnprfval 19129 gsum2dlem2 19572 gsum2d 19573 tsmsxp 23306 numedglnl 27514 vtxdginducedm1fi 27911 finsumvtxdg2ssteplem2 27913 finsumvtxdg2ssteplem4 27915 finsumvtxdg2sstep 27916 vtxdgoddnumeven 27920 relfi 30941 fedgmullem2 31711 esum2d 32061 etransclem27 43802 |
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