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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 9331 | . 2 ⊢ (𝐴 ∈ Fin → dom 𝐴 ≼ 𝐴) | |
| 2 | domfi 9212 | . 2 ⊢ ((𝐴 ∈ Fin ∧ dom 𝐴 ≼ 𝐴) → dom 𝐴 ∈ Fin) | |
| 3 | 1, 2 | mpdan 700 | 1 ⊢ (𝐴 ∈ Fin → dom 𝐴 ∈ Fin) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 class class class wbr 5102 dom cdm 5651 ≼ cdom 8979 Fincfn 8981 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-om 7882 df-1st 8005 df-2nd 8006 df-1o 8484 df-en 8982 df-dom 8983 df-fin 8985 |
| This theorem is used by: fundmfibi 9333 residfi 9335 rnfi 9337 hashfun 14589 hashreshashfun 14591 psgnprfval 19744 gsum2dlem2 20194 gsum2d 20195 tsmsxp 24483 numedglnl 29731 vtxdginducedm1fi 30134 finsumvtxdg2ssteplem2 30136 finsumvtxdg2ssteplem4 30138 finsumvtxdg2sstep 30139 vtxdgoddnumeven 30143 relfi 33247 gsumfs2d 33672 fedgmullem2 34312 esum2d 34775 imadomfi 43189 etransclem27 47407 |
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