Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
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 | ffun 6048 | . . 3 ⊢ (𝐹:𝐷⟶𝑅 → Fun 𝐹) | |
3 | 1, 2 | syl 17 | . 2 ⊢ (𝜑 → Fun 𝐹) |
4 | fdmfisuppfi.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ Fin) | |
5 | fdmfisuppfi.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑉) | |
6 | 1, 4, 5 | fdmfisuppfi 8284 | . 2 ⊢ (𝜑 → (𝐹 supp 𝑍) ∈ Fin) |
7 | ffn 6045 | . . . . 5 ⊢ (𝐹:𝐷⟶𝑅 → 𝐹 Fn 𝐷) | |
8 | 1, 7 | syl 17 | . . . 4 ⊢ (𝜑 → 𝐹 Fn 𝐷) |
9 | fnex 6481 | . . . 4 ⊢ ((𝐹 Fn 𝐷 ∧ 𝐷 ∈ Fin) → 𝐹 ∈ V) | |
10 | 8, 4, 9 | syl2anc 693 | . . 3 ⊢ (𝜑 → 𝐹 ∈ V) |
11 | isfsupp 8279 | . . 3 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ 𝑉) → (𝐹 finSupp 𝑍 ↔ (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin))) | |
12 | 10, 5, 11 | syl2anc 693 | . 2 ⊢ (𝜑 → (𝐹 finSupp 𝑍 ↔ (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin))) |
13 | 3, 6, 12 | mpbir2and 957 | 1 ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 ∈ wcel 1990 Vcvv 3200 class class class wbr 4653 Fun wfun 5882 Fn wfn 5883 ⟶wf 5884 (class class class)co 6650 supp csupp 7295 Fincfn 7955 finSupp cfsupp 8275 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-supp 7296 df-er 7742 df-en 7956 df-fin 7959 df-fsupp 8276 |
This theorem is referenced by: fsuppmptdm 8286 fndmfifsupp 8288 gsummptfif1o 18367 psrmulcllem 19387 frlmfibas 20105 elfilspd 20142 tmdgsum 21899 tsmslem1 21932 tsmssubm 21946 tsmsres 21947 tsmsf1o 21948 tsmsmhm 21949 tsmsadd 21950 tsmsxplem1 21956 tsmsxplem2 21957 imasdsf1olem 22178 xrge0gsumle 22636 xrge0tsms 22637 ehlbase 23194 jensenlem2 24714 jensen 24715 amgmlem 24716 amgm 24717 wilthlem2 24795 wilthlem3 24796 gsumle 29779 xrge0tsmsd 29785 esumpfinvalf 30138 k0004ss2 38450 rrxbasefi 40503 sge0tsms 40597 fsuppmptdmf 42162 linccl 42203 lcosn0 42209 islinindfis 42238 snlindsntor 42260 ldepspr 42262 zlmodzxzldeplem2 42290 amgmwlem 42548 amgmlemALT 42549 |
Copyright terms: Public domain | W3C validator |