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Mirrors > Home > MPE Home > Th. List > fdmfifsupp | Structured version Visualization version GIF version |
Description: A function with a finite domain is always finitely supported. (Contributed by AV, 25-May-2019.) |
Ref | Expression |
---|---|
fdmfisuppfi.f | ⊢ (𝜑 → 𝐹:𝐷⟶𝑅) |
fdmfisuppfi.d | ⊢ (𝜑 → 𝐷 ∈ Fin) |
fdmfisuppfi.z | ⊢ (𝜑 → 𝑍 ∈ 𝑉) |
Ref | Expression |
---|---|
fdmfifsupp | ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fdmfisuppfi.f | . . 3 ⊢ (𝜑 → 𝐹:𝐷⟶𝑅) | |
2 | 1 | ffund 6520 | . 2 ⊢ (𝜑 → Fun 𝐹) |
3 | fdmfisuppfi.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ Fin) | |
4 | fdmfisuppfi.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑉) | |
5 | 1, 3, 4 | fdmfisuppfi 8844 | . 2 ⊢ (𝜑 → (𝐹 supp 𝑍) ∈ Fin) |
6 | 1 | ffnd 6517 | . . . 4 ⊢ (𝜑 → 𝐹 Fn 𝐷) |
7 | fnex 6982 | . . . 4 ⊢ ((𝐹 Fn 𝐷 ∧ 𝐷 ∈ Fin) → 𝐹 ∈ V) | |
8 | 6, 3, 7 | syl2anc 586 | . . 3 ⊢ (𝜑 → 𝐹 ∈ V) |
9 | isfsupp 8839 | . . 3 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ 𝑉) → (𝐹 finSupp 𝑍 ↔ (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin))) | |
10 | 8, 4, 9 | syl2anc 586 | . 2 ⊢ (𝜑 → (𝐹 finSupp 𝑍 ↔ (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin))) |
11 | 2, 5, 10 | mpbir2and 711 | 1 ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∈ wcel 2114 Vcvv 3496 class class class wbr 5068 Fun wfun 6351 Fn wfn 6352 ⟶wf 6353 (class class class)co 7158 supp csupp 7832 Fincfn 8511 finSupp cfsupp 8835 |
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 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 |
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 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-reu 3147 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-supp 7833 df-er 8291 df-en 8512 df-fin 8515 df-fsupp 8836 |
This theorem is referenced by: fsuppmptdm 8846 fndmfifsupp 8848 gsumreidx 19039 gsummptfif1o 19090 psrmulcllem 20169 frlmfibas 20908 elfilspd 20949 tmdgsum 22705 tsmslem1 22739 tsmssubm 22753 tsmsres 22754 tsmsf1o 22755 tsmsmhm 22756 tsmsadd 22757 tsmsxplem1 22763 tsmsxplem2 22764 imasdsf1olem 22985 xrge0gsumle 23443 xrge0tsms 23444 rrxbasefi 24015 ehlbase 24020 jensenlem2 25567 jensen 25568 amgmlem 25569 amgm 25570 wilthlem2 25648 wilthlem3 25649 xrge0tsmsd 30694 gsumle 30727 linds2eq 30943 esumpfinvalf 31337 k0004ss2 40509 sge0tsms 42669 fsuppmptdmf 44436 linccl 44476 lcosn0 44482 islinindfis 44511 snlindsntor 44533 ldepspr 44535 zlmodzxzldeplem2 44563 amgmwlem 44910 amgmlemALT 44911 |
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