| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > drngmulne0 | Structured version Visualization version GIF version | ||
| Description: A product is nonzero iff both its factors are nonzero. (Contributed by NM, 18-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) |
| Ref | Expression |
|---|---|
| drngmulne0 | ⊢ (𝜑 → ((𝑋 · 𝑌) ≠ 0 ↔ (𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | drngmuleq0.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 2 | drngmuleq0.o | . . . 4 ⊢ 0 = (0g‘𝑅) | |
| 3 | drngmuleq0.t | . . . 4 ⊢ · = (.r‘𝑅) | |
| 4 | drngmuleq0.r | . . . 4 ⊢ (𝜑 → 𝑅 ∈ DivRing) | |
| 5 | drngmuleq0.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 6 | drngmuleq0.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 7 | 1, 2, 3, 4, 5, 6 | drngmul0or 20691 | . . 3 ⊢ (𝜑 → ((𝑋 · 𝑌) = 0 ↔ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
| 8 | 7 | necon3abid 2966 | . 2 ⊢ (𝜑 → ((𝑋 · 𝑌) ≠ 0 ↔ ¬ (𝑋 = 0 ∨ 𝑌 = 0 ))) |
| 9 | neanior 3023 | . 2 ⊢ ((𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ) ↔ ¬ (𝑋 = 0 ∨ 𝑌 = 0 )) | |
| 10 | 8, 9 | bitr4di 289 | 1 ⊢ (𝜑 → ((𝑋 · 𝑌) ≠ 0 ↔ (𝑋 ≠ 0 ∧ 𝑌 ≠ 0 ))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 847 = wceq 1541 ∈ wcel 2113 ≠ wne 2930 ‘cfv 6490 (class class class)co 7356 Basecbs 17134 .rcmulr 17176 0gc0g 17357 DivRingcdr 20660 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-tpos 8166 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-nn 12144 df-2 12206 df-3 12207 df-sets 17089 df-slot 17107 df-ndx 17119 df-base 17135 df-ress 17156 df-plusg 17188 df-mulr 17189 df-0g 17359 df-mgm 18563 df-sgrp 18642 df-mnd 18658 df-grp 18864 df-minusg 18865 df-cmn 19709 df-abl 19710 df-mgp 20074 df-rng 20086 df-ur 20115 df-ring 20168 df-oppr 20271 df-dvdsr 20291 df-unit 20292 df-invr 20322 df-nzr 20444 df-rlreg 20625 df-domn 20626 df-drng 20662 |
| This theorem is referenced by: orngmullt 20802 lcfrlem31 41772 drnginvmuld 42724 |
| Copyright terms: Public domain | W3C validator |