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Mirrors > Home > MPE Home > Th. List > drngmuleq0 | Structured version Visualization version GIF version |
Description: An element is zero iff its product with a nonzero element is zero. (Contributed by NM, 8-Oct-2014.) |
Ref | Expression |
---|---|
drngmuleq0.b | ⊢ 𝐵 = (Base‘𝑅) |
drngmuleq0.o | ⊢ 0 = (0g‘𝑅) |
drngmuleq0.t | ⊢ · = (.r‘𝑅) |
drngmuleq0.r | ⊢ (𝜑 → 𝑅 ∈ DivRing) |
drngmuleq0.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
drngmuleq0.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
drngmuleq0.e | ⊢ (𝜑 → 𝑌 ≠ 0 ) |
Ref | Expression |
---|---|
drngmuleq0 | ⊢ (𝜑 → ((𝑋 · 𝑌) = 0 ↔ 𝑋 = 0 )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | drngmuleq0.b | . . 3 ⊢ 𝐵 = (Base‘𝑅) | |
2 | drngmuleq0.o | . . 3 ⊢ 0 = (0g‘𝑅) | |
3 | drngmuleq0.t | . . 3 ⊢ · = (.r‘𝑅) | |
4 | drngmuleq0.r | . . 3 ⊢ (𝜑 → 𝑅 ∈ DivRing) | |
5 | drngmuleq0.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
6 | drngmuleq0.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
7 | 1, 2, 3, 4, 5, 6 | drngmul0or 20012 | . 2 ⊢ (𝜑 → ((𝑋 · 𝑌) = 0 ↔ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
8 | drngmuleq0.e | . . 3 ⊢ (𝜑 → 𝑌 ≠ 0 ) | |
9 | df-ne 2944 | . . . 4 ⊢ (𝑌 ≠ 0 ↔ ¬ 𝑌 = 0 ) | |
10 | orel2 888 | . . . . 5 ⊢ (¬ 𝑌 = 0 → ((𝑋 = 0 ∨ 𝑌 = 0 ) → 𝑋 = 0 )) | |
11 | orc 864 | . . . . 5 ⊢ (𝑋 = 0 → (𝑋 = 0 ∨ 𝑌 = 0 )) | |
12 | 10, 11 | impbid1 224 | . . . 4 ⊢ (¬ 𝑌 = 0 → ((𝑋 = 0 ∨ 𝑌 = 0 ) ↔ 𝑋 = 0 )) |
13 | 9, 12 | sylbi 216 | . . 3 ⊢ (𝑌 ≠ 0 → ((𝑋 = 0 ∨ 𝑌 = 0 ) ↔ 𝑋 = 0 )) |
14 | 8, 13 | syl 17 | . 2 ⊢ (𝜑 → ((𝑋 = 0 ∨ 𝑌 = 0 ) ↔ 𝑋 = 0 )) |
15 | 7, 14 | bitrd 278 | 1 ⊢ (𝜑 → ((𝑋 · 𝑌) = 0 ↔ 𝑋 = 0 )) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∨ wo 844 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ‘cfv 6433 (class class class)co 7275 Basecbs 16912 .rcmulr 16963 0gc0g 17150 DivRingcdr 19991 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-tpos 8042 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-2 12036 df-3 12037 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-0g 17152 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 df-mgp 19721 df-ur 19738 df-ring 19785 df-oppr 19862 df-dvdsr 19883 df-unit 19884 df-invr 19914 df-drng 19993 |
This theorem is referenced by: lkrsc 37111 |
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