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| Mirrors > Home > MPE Home > Th. List > fidmfisupp | Structured version Visualization version GIF version | ||
| Description: A function with a finite domain is finitely supported. (Contributed by Glauco Siliprandi, 24-Dec-2020.) |
| Ref | Expression |
|---|---|
| fidmfisupp.1 | ⊢ (𝜑 → 𝐹:𝐷⟶𝑅) |
| fidmfisupp.2 | ⊢ (𝜑 → 𝐷 ∈ Fin) |
| fidmfisupp.3 | ⊢ (𝜑 → 𝑍 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| fidmfisupp | ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fidmfisupp.1 | . . . . 5 ⊢ (𝜑 → 𝐹:𝐷⟶𝑅) | |
| 2 | fidmfisupp.2 | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ Fin) | |
| 3 | 1, 2 | fexd 7231 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ V) |
| 4 | fidmfisupp.3 | . . . 4 ⊢ (𝜑 → 𝑍 ∈ 𝑉) | |
| 5 | suppimacnv 8184 | . . . 4 ⊢ ((𝐹 ∈ V ∧ 𝑍 ∈ 𝑉) → (𝐹 supp 𝑍) = (◡𝐹 “ (V ∖ {𝑍}))) | |
| 6 | 3, 4, 5 | syl2anc 596 | . . 3 ⊢ (𝜑 → (𝐹 supp 𝑍) = (◡𝐹 “ (V ∖ {𝑍}))) |
| 7 | 2, 1 | fisuppfi 9356 | . . 3 ⊢ (𝜑 → (◡𝐹 “ (V ∖ {𝑍})) ∈ Fin) |
| 8 | 6, 7 | eqeltrd 2861 | . 2 ⊢ (𝜑 → (𝐹 supp 𝑍) ∈ Fin) |
| 9 | 1 | ffund 6712 | . . 3 ⊢ (𝜑 → Fun 𝐹) |
| 10 | funisfsupp 9352 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐹 ∈ V ∧ 𝑍 ∈ 𝑉) → (𝐹 finSupp 𝑍 ↔ (𝐹 supp 𝑍) ∈ Fin)) | |
| 11 | 9, 3, 4, 10 | syl3anc 1398 | . 2 ⊢ (𝜑 → (𝐹 finSupp 𝑍 ↔ (𝐹 supp 𝑍) ∈ Fin)) |
| 12 | 8, 11 | mpbird 260 | 1 ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 Vcvv 3451 ∖ cdif 3896 {csn 4584 class class class wbr 5103 ◡ccnv 5650 “ cima 5654 Fun wfun 6531 ⟶wf 6533 (class class class)co 7418 supp csupp 8170 Fincfn 8966 finSupp cfsupp 9346 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7749 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-supp 8171 df-1o 8469 df-en 8967 df-fin 8970 df-fsupp 9347 |
| This theorem is used by: mptiffisupp 33279 gsummulsubdishift2 33623 evl1deg2 34102 0mplrim 34139 esplylem 34191 esplyfv1 34194 esplyfvaln 34199 esplyind 34200 rrxtopnfi 47266 |
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