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Mirrors > Home > MPE Home > Th. List > fprodn0f | Structured version Visualization version GIF version |
Description: A finite product of nonzero terms is nonzero. A version of fprodn0 15425 using bound-variable hypotheses instead of distinct variable conditions. (Contributed by Glauco Siliprandi, 5-Apr-2020.) |
Ref | Expression |
---|---|
fprodn0f.kph | ⊢ Ⅎ𝑘𝜑 |
fprodn0f.a | ⊢ (𝜑 → 𝐴 ∈ Fin) |
fprodn0f.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ) |
fprodn0f.bne0 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ≠ 0) |
Ref | Expression |
---|---|
fprodn0f | ⊢ (𝜑 → ∏𝑘 ∈ 𝐴 𝐵 ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fprodn0f.kph | . . 3 ⊢ Ⅎ𝑘𝜑 | |
2 | difssd 4023 | . . 3 ⊢ (𝜑 → (ℂ ∖ {0}) ⊆ ℂ) | |
3 | eldifi 4017 | . . . . . . 7 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → 𝑥 ∈ ℂ) | |
4 | 3 | adantr 484 | . . . . . 6 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑥 ∈ ℂ) |
5 | eldifi 4017 | . . . . . . 7 ⊢ (𝑦 ∈ (ℂ ∖ {0}) → 𝑦 ∈ ℂ) | |
6 | 5 | adantl 485 | . . . . . 6 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ∈ ℂ) |
7 | 4, 6 | mulcld 10739 | . . . . 5 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 · 𝑦) ∈ ℂ) |
8 | eldifsni 4678 | . . . . . . . . 9 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → 𝑥 ≠ 0) | |
9 | 8 | adantr 484 | . . . . . . . 8 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑥 ≠ 0) |
10 | eldifsni 4678 | . . . . . . . . 9 ⊢ (𝑦 ∈ (ℂ ∖ {0}) → 𝑦 ≠ 0) | |
11 | 10 | adantl 485 | . . . . . . . 8 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ≠ 0) |
12 | 4, 6, 9, 11 | mulne0d 11370 | . . . . . . 7 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 · 𝑦) ≠ 0) |
13 | 12 | neneqd 2939 | . . . . . 6 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → ¬ (𝑥 · 𝑦) = 0) |
14 | ovex 7203 | . . . . . . 7 ⊢ (𝑥 · 𝑦) ∈ V | |
15 | 14 | elsn 4531 | . . . . . 6 ⊢ ((𝑥 · 𝑦) ∈ {0} ↔ (𝑥 · 𝑦) = 0) |
16 | 13, 15 | sylnibr 332 | . . . . 5 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → ¬ (𝑥 · 𝑦) ∈ {0}) |
17 | 7, 16 | eldifd 3854 | . . . 4 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 · 𝑦) ∈ (ℂ ∖ {0})) |
18 | 17 | adantl 485 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0}))) → (𝑥 · 𝑦) ∈ (ℂ ∖ {0})) |
19 | fprodn0f.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
20 | fprodn0f.b | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ) | |
21 | fprodn0f.bne0 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ≠ 0) | |
22 | 21 | neneqd 2939 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ¬ 𝐵 = 0) |
23 | elsng 4530 | . . . . . 6 ⊢ (𝐵 ∈ ℂ → (𝐵 ∈ {0} ↔ 𝐵 = 0)) | |
24 | 20, 23 | syl 17 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝐵 ∈ {0} ↔ 𝐵 = 0)) |
25 | 22, 24 | mtbird 328 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ¬ 𝐵 ∈ {0}) |
26 | 20, 25 | eldifd 3854 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (ℂ ∖ {0})) |
27 | ax-1cn 10673 | . . . . 5 ⊢ 1 ∈ ℂ | |
28 | ax-1ne0 10684 | . . . . . 6 ⊢ 1 ≠ 0 | |
29 | 1ex 10715 | . . . . . . 7 ⊢ 1 ∈ V | |
30 | 29 | elsn 4531 | . . . . . 6 ⊢ (1 ∈ {0} ↔ 1 = 0) |
31 | 28, 30 | nemtbir 3029 | . . . . 5 ⊢ ¬ 1 ∈ {0} |
32 | eldif 3853 | . . . . 5 ⊢ (1 ∈ (ℂ ∖ {0}) ↔ (1 ∈ ℂ ∧ ¬ 1 ∈ {0})) | |
33 | 27, 31, 32 | mpbir2an 711 | . . . 4 ⊢ 1 ∈ (ℂ ∖ {0}) |
34 | 33 | a1i 11 | . . 3 ⊢ (𝜑 → 1 ∈ (ℂ ∖ {0})) |
35 | 1, 2, 18, 19, 26, 34 | fprodcllemf 15404 | . 2 ⊢ (𝜑 → ∏𝑘 ∈ 𝐴 𝐵 ∈ (ℂ ∖ {0})) |
36 | eldifsni 4678 | . 2 ⊢ (∏𝑘 ∈ 𝐴 𝐵 ∈ (ℂ ∖ {0}) → ∏𝑘 ∈ 𝐴 𝐵 ≠ 0) | |
37 | 35, 36 | syl 17 | 1 ⊢ (𝜑 → ∏𝑘 ∈ 𝐴 𝐵 ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1542 Ⅎwnf 1790 ∈ wcel 2114 ≠ wne 2934 ∖ cdif 3840 {csn 4516 (class class class)co 7170 Fincfn 8555 ℂcc 10613 0cc0 10615 1c1 10616 · cmul 10620 ∏cprod 15351 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-inf2 9177 ax-cnex 10671 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 ax-pre-sup 10693 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-int 4837 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-se 5484 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-isom 6348 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-1st 7714 df-2nd 7715 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-1o 8131 df-er 8320 df-en 8556 df-dom 8557 df-sdom 8558 df-fin 8559 df-sup 8979 df-oi 9047 df-card 9441 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-div 11376 df-nn 11717 df-2 11779 df-3 11780 df-n0 11977 df-z 12063 df-uz 12325 df-rp 12473 df-fz 12982 df-fzo 13125 df-seq 13461 df-exp 13522 df-hash 13783 df-cj 14548 df-re 14549 df-im 14550 df-sqrt 14684 df-abs 14685 df-clim 14935 df-prod 15352 |
This theorem is referenced by: fprodle 15442 |
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