| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 9298 | . 2 ⊢ (𝐴 ∈ Fin → dom 𝐴 ≼ 𝐴) | |
| 2 | domfi 9180 | . 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 2146 class class class wbr 5111 dom cdm 5663 ≼ cdom 8947 Fincfn 8949 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-om 7869 df-1st 7992 df-2nd 7993 df-1o 8459 df-en 8950 df-dom 8951 df-fin 8953 |
| This theorem is used by: fundmfibi 9300 residfi 9302 rnfi 9304 hashfun 14494 hashreshashfun 14496 psgnprfval 19637 gsum2dlem2 20087 gsum2d 20088 tsmsxp 24365 numedglnl 29551 vtxdginducedm1fi 29954 finsumvtxdg2ssteplem2 29956 finsumvtxdg2ssteplem4 29958 finsumvtxdg2sstep 29959 vtxdgoddnumeven 29963 relfi 33020 gsumfs2d 33447 fedgmullem2 34086 esum2d 34549 imadomfi 42829 etransclem27 47035 |
| Copyright terms: Public domain | W3C validator |