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Mirrors > Home > MPE Home > Th. List > domnmuln0 | Structured version Visualization version GIF version |
Description: In a domain, a product of nonzero elements is nonzero. (Contributed by Mario Carneiro, 6-May-2015.) |
Ref | Expression |
---|---|
domneq0.b | ⊢ 𝐵 = (Base‘𝑅) |
domneq0.t | ⊢ · = (.r‘𝑅) |
domneq0.z | ⊢ 0 = (0g‘𝑅) |
Ref | Expression |
---|---|
domnmuln0 | ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ) ∧ (𝑌 ∈ 𝐵 ∧ 𝑌 ≠ 0 )) → (𝑋 · 𝑌) ≠ 0 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | an4 656 | . . 3 ⊢ (((𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ) ∧ (𝑌 ∈ 𝐵 ∧ 𝑌 ≠ 0 )) ↔ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ))) | |
2 | neanior 3026 | . . . . . 6 ⊢ ((𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ) ↔ ¬ (𝑋 = 0 ∨ 𝑌 = 0 )) | |
3 | domneq0.b | . . . . . . . . 9 ⊢ 𝐵 = (Base‘𝑅) | |
4 | domneq0.t | . . . . . . . . 9 ⊢ · = (.r‘𝑅) | |
5 | domneq0.z | . . . . . . . . 9 ⊢ 0 = (0g‘𝑅) | |
6 | 3, 4, 5 | domneq0 20189 | . . . . . . . 8 ⊢ ((𝑅 ∈ Domn ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 · 𝑌) = 0 ↔ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
7 | 6 | 3expb 1121 | . . . . . . 7 ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 · 𝑌) = 0 ↔ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
8 | 7 | necon3abid 2970 | . . . . . 6 ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 · 𝑌) ≠ 0 ↔ ¬ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
9 | 2, 8 | bitr4id 293 | . . . . 5 ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ) ↔ (𝑋 · 𝑌) ≠ 0 )) |
10 | 9 | biimpd 232 | . . . 4 ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵)) → ((𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ) → (𝑋 · 𝑌) ≠ 0 )) |
11 | 10 | expimpd 457 | . . 3 ⊢ (𝑅 ∈ Domn → (((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑋 ≠ 0 ∧ 𝑌 ≠ 0 )) → (𝑋 · 𝑌) ≠ 0 )) |
12 | 1, 11 | syl5bi 245 | . 2 ⊢ (𝑅 ∈ Domn → (((𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ) ∧ (𝑌 ∈ 𝐵 ∧ 𝑌 ≠ 0 )) → (𝑋 · 𝑌) ≠ 0 )) |
13 | 12 | 3impib 1117 | 1 ⊢ ((𝑅 ∈ Domn ∧ (𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ) ∧ (𝑌 ∈ 𝐵 ∧ 𝑌 ≠ 0 )) → (𝑋 · 𝑌) ≠ 0 ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2114 ≠ wne 2934 ‘cfv 6339 (class class class)co 7170 Basecbs 16586 .rcmulr 16669 0gc0g 16816 Domncdomn 20172 |
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-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 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 |
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-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-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-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-er 8320 df-en 8556 df-dom 8557 df-sdom 8558 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-nn 11717 df-2 11779 df-ndx 16589 df-slot 16590 df-base 16592 df-sets 16593 df-plusg 16681 df-0g 16818 df-mgm 17968 df-sgrp 18017 df-mnd 18028 df-grp 18222 df-minusg 18223 df-mgp 19359 df-ring 19418 df-nzr 20150 df-domn 20176 |
This theorem is referenced by: abvn0b 20194 isdomn4 39763 deg1mhm 40604 domnmsuppn0 45239 |
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