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Mirrors > Home > MPE Home > Th. List > rabfi | Structured version Visualization version GIF version |
Description: A restricted class built from a finite set is finite. (Contributed by Thierry Arnoux, 14-Feb-2017.) |
Ref | Expression |
---|---|
rabfi | ⊢ (𝐴 ∈ Fin → {𝑥 ∈ 𝐴 ∣ 𝜑} ∈ Fin) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfrab3 4278 | . 2 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = (𝐴 ∩ {𝑥 ∣ 𝜑}) | |
2 | infi 8742 | . 2 ⊢ (𝐴 ∈ Fin → (𝐴 ∩ {𝑥 ∣ 𝜑}) ∈ Fin) | |
3 | 1, 2 | eqeltrid 2917 | 1 ⊢ (𝐴 ∈ Fin → {𝑥 ∈ 𝐴 ∣ 𝜑} ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 {cab 2799 {crab 3142 ∩ cin 3935 Fincfn 8509 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-om 7581 df-er 8289 df-en 8510 df-fin 8513 |
This theorem is referenced by: sygbasnfpfi 18640 finptfin 22126 lfinun 22133 numedglnl 26929 usgrfilem 27109 nbusgrfi 27156 cusgrsizeindslem 27233 cusgrsizeinds 27234 vtxdgfival 27251 vtxdgfisnn0 27257 vtxdginducedm1fi 27326 finsumvtxdg2ssteplem4 27330 vtxdgoddnumeven 27335 hashwwlksnext 27693 wwlksnonfi 27699 rusgrnumwwlks 27753 clwwlknclwwlkdifnum 27758 clwwlknonfin 27873 konigsberglem5 28035 fusgreghash2wsp 28117 numclwwlk3lem2 28163 reprfi 31887 phpreu 34891 poimirlem25 34932 poimirlem26 34933 poimirlem27 34934 poimirlem28 34935 poimirlem31 34938 poimirlem32 34939 sstotbnd3 35069 hoidmvlelem2 42898 |
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