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| Mirrors > Home > MPE Home > Th. List > resfsupp | Structured version Visualization version GIF version | ||
| Description: If the restriction of a function by a set which, subtracted from the domain of the function so that its difference is finitely supported, the function itself is finitely supported. (Contributed by AV, 27-May-2019.) |
| Ref | Expression |
|---|---|
| resfsupp.b | ⊢ (𝜑 → (dom 𝐹 ∖ 𝐵) ∈ Fin) |
| resfsupp.e | ⊢ (𝜑 → 𝐹 ∈ 𝑊) |
| resfsupp.f | ⊢ (𝜑 → Fun 𝐹) |
| resfsupp.g | ⊢ (𝜑 → 𝐺 = (𝐹 ↾ 𝐵)) |
| resfsupp.s | ⊢ (𝜑 → 𝐺 finSupp 𝑍) |
| resfsupp.z | ⊢ (𝜑 → 𝑍 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| resfsupp | ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resfsupp.b | . . 3 ⊢ (𝜑 → (dom 𝐹 ∖ 𝐵) ∈ Fin) | |
| 2 | resfsupp.e | . . 3 ⊢ (𝜑 → 𝐹 ∈ 𝑊) | |
| 3 | resfsupp.g | . . 3 ⊢ (𝜑 → 𝐺 = (𝐹 ↾ 𝐵)) | |
| 4 | resfsupp.s | . . . 4 ⊢ (𝜑 → 𝐺 finSupp 𝑍) | |
| 5 | 4 | fsuppimpd 9361 | . . 3 ⊢ (𝜑 → (𝐺 supp 𝑍) ∈ Fin) |
| 6 | resfsupp.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝑉) | |
| 7 | 1, 2, 3, 5, 6 | ressuppfi 9387 | . 2 ⊢ (𝜑 → (𝐹 supp 𝑍) ∈ Fin) |
| 8 | resfsupp.f | . . 3 ⊢ (𝜑 → Fun 𝐹) | |
| 9 | funisfsupp 9359 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐹 ∈ 𝑊 ∧ 𝑍 ∈ 𝑉) → (𝐹 finSupp 𝑍 ↔ (𝐹 supp 𝑍) ∈ Fin)) | |
| 10 | 8, 2, 6, 9 | syl3anc 1398 | . 2 ⊢ (𝜑 → (𝐹 finSupp 𝑍 ↔ (𝐹 supp 𝑍) ∈ Fin)) |
| 11 | 7, 10 | mpbird 260 | 1 ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1569 ∈ wcel 2144 ∖ cdif 4045 class class class wbr 5102 dom cdm 5650 ↾ cres 5652 Fun wfun 6532 (class class class)co 7420 supp csupp 8177 Fincfn 8973 finSupp cfsupp 9353 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-supp 8178 df-1o 8476 df-en 8974 df-fin 8977 df-fsupp 9354 |
| This theorem is used by: lincext2 49567 |
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