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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 9323 | . 2 ⊢ (𝐴 ∈ Fin → dom 𝐴 ≼ 𝐴) | |
| 2 | domfi 9204 | . 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 2145 class class class wbr 5103 dom cdm 5651 ≼ cdom 8971 Fincfn 8973 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 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 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-om 7878 df-1st 8001 df-2nd 8002 df-1o 8476 df-en 8974 df-dom 8975 df-fin 8977 |
| This theorem is used by: fundmfibi 9325 residfi 9327 rnfi 9329 hashfun 14582 hashreshashfun 14584 psgnprfval 19735 gsum2dlem2 20185 gsum2d 20186 tsmsxp 24474 numedglnl 29722 vtxdginducedm1fi 30125 finsumvtxdg2ssteplem2 30127 finsumvtxdg2ssteplem4 30129 finsumvtxdg2sstep 30130 vtxdgoddnumeven 30134 relfi 33196 gsumfs2d 33622 fedgmullem2 34262 esum2d 34725 imadomfi 43052 etransclem27 47270 |
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