Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
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 8164 | . . 3 ⊢ (𝐹 finSupp 𝑍 → (Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin)) | |
3 | fsuppun.g | . . . . . 6 ⊢ (𝜑 → 𝐺 finSupp 𝑍) | |
4 | fsuppimp 8164 | . . . . . 6 ⊢ (𝐺 finSupp 𝑍 → (Fun 𝐺 ∧ (𝐺 supp 𝑍) ∈ Fin)) | |
5 | unfi 8112 | . . . . . . . 8 ⊢ (((𝐹 supp 𝑍) ∈ Fin ∧ (𝐺 supp 𝑍) ∈ Fin) → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin) | |
6 | 5 | expcom 450 | . . . . . . 7 ⊢ ((𝐺 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
7 | 6 | adantl 481 | . . . . . 6 ⊢ ((Fun 𝐺 ∧ (𝐺 supp 𝑍) ∈ Fin) → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
8 | 3, 4, 7 | 3syl 18 | . . . . 5 ⊢ (𝜑 → ((𝐹 supp 𝑍) ∈ Fin → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
9 | 8 | com12 32 | . . . 4 ⊢ ((𝐹 supp 𝑍) ∈ Fin → (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
10 | 9 | adantl 481 | . . 3 ⊢ ((Fun 𝐹 ∧ (𝐹 supp 𝑍) ∈ Fin) → (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
11 | 2, 10 | syl 17 | . 2 ⊢ (𝐹 finSupp 𝑍 → (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin)) |
12 | 1, 11 | mpcom 37 | 1 ⊢ (𝜑 → ((𝐹 supp 𝑍) ∪ (𝐺 supp 𝑍)) ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∈ wcel 1977 ∪ cun 3538 class class class wbr 4583 Fun wfun 5798 (class class class)co 6549 supp csupp 7182 Fincfn 7841 finSupp cfsupp 8158 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-oadd 7451 df-er 7629 df-en 7842 df-fin 7845 df-fsupp 8159 |
This theorem is referenced by: wemapso2lem 8340 dprdfadd 18242 |
Copyright terms: Public domain | W3C validator |