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| Mirrors > Home > MPE Home > Th. List > fsuppunfi | Structured version Visualization version GIF version | ||
| Description: The union of the support of two finitely supported functions is finite. (Contributed by AV, 1-Jul-2019.) |
| Ref | Expression |
|---|---|
| fsuppun.f | ⊢ (𝜑 → 𝐹 finSupp 𝑍) |
| fsuppun.g | ⊢ (𝜑 → 𝐺 finSupp 𝑍) |
| Ref | Expression |
|---|---|
| fsuppunfi | ⊢ (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsuppun.f | . 2 ⊢ (𝜑 → 𝐹 finSupp 𝑍) | |
| 2 | fsuppimp 9341 | . . 3 ⊢ (𝐹 finSupp 𝑍 → (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin)) | |
| 3 | fsuppun.g | . . . . 5 ⊢ (𝜑 → 𝐺 finSupp 𝑍) | |
| 4 | fsuppimp 9341 | . . . . 5 ⊢ (𝐺 finSupp 𝑍 → (Fun 𝐺 ∧ (𝐺 supp 𝑍) ∈ Fin)) | |
| 5 | unfi 9168 | . . . . . . 7 ⊢ (((𝐹 supp 𝑍) ∈ Fin ∧ (𝐺 supp 𝑍) ∈ Fin) → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin) | |
| 6 | 5 | expcom 419 | . . . . . 6 ⊢ ((𝐺 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
| 7 | 6 | adantl 487 | . . . . 5 ⊢ ((Fun 𝐺 ∧ (𝐺 supp 𝑍) ∈ Fin) → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
| 8 | 3, 4, 7 | 3syl 19 | . . . 4 ⊢ (𝜑 → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
| 9 | 8 | com12 33 | . . 3 ⊢ ((𝐹 supp 𝑍) ∈ Fin → (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
| 10 | 2, 9 | simpl2im 513 | . 2 ⊢ (𝐹 finSupp 𝑍 → (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
| 11 | 1, 10 | mpcom 39 | 1 ⊢ (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 ∪ cun 3900 class class class wbr 5107 Fun wfun 6531 (class class class)co 7416 supp csupp 8161 Fincfn 8955 finSupp cfsupp 9334 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-un 7739 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 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 7419 df-om 7866 df-en 8956 df-fin 8959 df-fsupp 9335 |
| This theorem is used by: wemapso2lem 9527 dprdfadd 20153 psrbagaddcl 22143 mhpmulcl 22381 naddcnff 44205 |
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