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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 9361 | . 2 ⊢ (𝐴 ∈ Fin → dom 𝐴 ≼ 𝐴) | |
| 2 | domfi 9242 | . 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 2147 class class class wbr 5108 dom cdm 5658 ≼ cdom 9009 Fincfn 9011 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-om 7912 df-1st 8035 df-2nd 8036 df-1o 8514 df-en 9012 df-dom 9013 df-fin 9015 |
| This theorem is used by: fundmfibi 9363 residfi 9365 rnfi 9367 hashfun 14623 hashreshashfun 14625 psgnprfval 19786 gsum2dlem2 20236 gsum2d 20237 tsmsxp 24529 numedglnl 29779 vtxdginducedm1fi 30182 finsumvtxdg2ssteplem2 30184 finsumvtxdg2ssteplem4 30186 finsumvtxdg2sstep 30187 vtxdgoddnumeven 30191 relfi 33294 gsumfs2d 33721 fedgmullem2 34373 esum2d 34836 imadomfi 43318 etransclem27 47544 |
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