| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > fsuppxpfi | Structured version Visualization version GIF version | ||
| Description: The cartesian product of two finitely supported functions is finite. (Contributed by AV, 17-Jul-2019.) |
| Ref | Expression |
|---|---|
| fsuppxpfi | ⊢ ((𝐹 finSupp 𝑍 ∧ 𝐺 finSupp 𝑍) → ((𝐹 supp 𝑍) × (𝐺 supp 𝑍)) ∈ Fin) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 23 | . . 3 ⊢ (𝐹 finSupp 𝑍 → 𝐹 finSupp 𝑍) | |
| 2 | 1 | fsuppimpd 9327 | . 2 ⊢ (𝐹 finSupp 𝑍 → (𝐹 supp 𝑍) ∈ Fin) |
| 3 | id 23 | . . 3 ⊢ (𝐺 finSupp 𝑍 → 𝐺 finSupp 𝑍) | |
| 4 | 3 | fsuppimpd 9327 | . 2 ⊢ (𝐺 finSupp 𝑍 → (𝐺 supp 𝑍) ∈ Fin) |
| 5 | xpfi 9277 | . 2 ⊢ (((𝐹 supp 𝑍) ∈ Fin ∧ (𝐺 supp 𝑍) ∈ Fin) → ((𝐹 supp 𝑍) × (𝐺 supp 𝑍)) ∈ Fin) | |
| 6 | 2, 4, 5 | syl2an 607 | 1 ⊢ ((𝐹 finSupp 𝑍 ∧ 𝐺 finSupp 𝑍) → ((𝐹 supp 𝑍) × (𝐺 supp 𝑍)) ∈ Fin) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 400 ∈ wcel 2142 class class class wbr 5108 × cxp 5658 (class class class)co 7412 supp csupp 8154 Fincfn 8941 finSupp cfsupp 9319 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pr 5403 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 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 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7415 df-om 7861 df-1o 8451 df-en 8942 df-dom 8943 df-fin 8945 df-fsupp 9320 |
| This theorem is used by: mplsubrglem 22164 |
| Copyright terms: Public domain | W3C validator |