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| Mirrors > Home > MPE Home > Th. List > mapfi | Structured version Visualization version GIF version | ||
| Description: Set exponentiation of finite sets is finite. (Contributed by Jeff Madsen, 19-Jun-2011.) |
| Ref | Expression |
|---|---|
| mapfi | ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → (𝐴 ↑m 𝐵) ∈ Fin) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpfi 9275 | . . . 4 ⊢ ((𝐵 ∈ Fin ∧ 𝐴 ∈ Fin) → (𝐵 × 𝐴) ∈ Fin) | |
| 2 | 1 | ancoms 463 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → (𝐵 × 𝐴) ∈ Fin) |
| 3 | pwfi 9274 | . . 3 ⊢ ((𝐵 × 𝐴) ∈ Fin ↔ 𝒫 (𝐵 × 𝐴) ∈ Fin) | |
| 4 | 2, 3 | sylib 221 | . 2 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → 𝒫 (𝐵 × 𝐴) ∈ Fin) |
| 5 | mapsspw 8872 | . 2 ⊢ (𝐴 ↑m 𝐵) ⊆ 𝒫 (𝐵 × 𝐴) | |
| 6 | ssfi 9153 | . 2 ⊢ ((𝒫 (𝐵 × 𝐴) ∈ Fin ∧ (𝐴 ↑m 𝐵) ⊆ 𝒫 (𝐵 × 𝐴)) → (𝐴 ↑m 𝐵) ∈ Fin) | |
| 7 | 4, 5, 6 | sylancl 597 | 1 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ∈ Fin) → (𝐴 ↑m 𝐵) ∈ Fin) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2143 ⊆ wss 3905 𝒫 cpw 4562 × cxp 5659 (class class class)co 7410 ↑m cmap 8820 Fincfn 8939 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-1o 8449 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-fin 8943 |
| This theorem is referenced by: ixpfi 9302 hashmap 14468 hashpw 14469 hashf1lem2 14489 prmreclem2 16972 vdwlem10 17045 efmndbasfi 18931 symgbasfi 19444 aannenlem1 26491 birthdaylem1 27116 dchrfi 27419 reprfi 35003 deranglem 35658 poimirlem9 38280 poimirlem26 38297 poimirlem27 38298 poimirlem28 38299 poimirlem32 38303 dvnprodlem2 46661 etransclem16 46964 etransclem33 46981 |
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