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| Mirrors > Home > MPE Home > Th. List > isdomn4r | Structured version Visualization version GIF version | ||
| Description: A ring is a domain iff it is nonzero and the right cancellation law for multiplication holds. (Contributed by SN, 20-Jun-2025.) |
| Ref | Expression |
|---|---|
| isdomn4r.b | ⊢ 𝐵 = (Base‘𝑅) |
| isdomn4r.0 | ⊢ 0 = (0g‘𝑅) |
| isdomn4r.x | ⊢ · = (.r‘𝑅) |
| Ref | Expression |
|---|---|
| isdomn4r | ⊢ (𝑅 ∈ Domn ↔ (𝑅 ∈ NzRing ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2763 | . . . 4 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
| 2 | isdomn4r.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 3 | 1, 2 | opprbas 20426 | . . 3 ⊢ 𝐵 = (Base‘(oppr‘𝑅)) |
| 4 | isdomn4r.0 | . . . 4 ⊢ 0 = (0g‘𝑅) | |
| 5 | 1, 4 | oppr0 20432 | . . 3 ⊢ 0 = (0g‘(oppr‘𝑅)) |
| 6 | eqid 2763 | . . 3 ⊢ (.r‘(oppr‘𝑅)) = (.r‘(oppr‘𝑅)) | |
| 7 | 3, 5, 6 | isdomn4 20801 | . 2 ⊢ ((oppr‘𝑅) ∈ Domn ↔ ((oppr‘𝑅) ∈ NzRing ∧ ∀𝑐 ∈ (𝐵 ∖ { 0 })∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏))) |
| 8 | 1 | opprdomnb 20802 | . 2 ⊢ (𝑅 ∈ Domn ↔ (oppr‘𝑅) ∈ Domn) |
| 9 | 1 | opprnzrb 20606 | . . 3 ⊢ (𝑅 ∈ NzRing ↔ (oppr‘𝑅) ∈ NzRing) |
| 10 | isdomn4r.x | . . . . . . . 8 ⊢ · = (.r‘𝑅) | |
| 11 | 2, 10, 1, 6 | opprmul 20423 | . . . . . . 7 ⊢ (𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑎 · 𝑐) |
| 12 | 2, 10, 1, 6 | opprmul 20423 | . . . . . . 7 ⊢ (𝑐(.r‘(oppr‘𝑅))𝑏) = (𝑏 · 𝑐) |
| 13 | 11, 12 | eqeq12i 2781 | . . . . . 6 ⊢ ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) ↔ (𝑎 · 𝑐) = (𝑏 · 𝑐)) |
| 14 | 13 | imbi1i 352 | . . . . 5 ⊢ (((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏) ↔ ((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏)) |
| 15 | 14 | 3ralbii 3142 | . . . 4 ⊢ (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏)) |
| 16 | ralrot3 3296 | . . . 4 ⊢ (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏) ↔ ∀𝑐 ∈ (𝐵 ∖ { 0 })∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏)) | |
| 17 | 15, 16 | bitr3i 280 | . . 3 ⊢ (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏) ↔ ∀𝑐 ∈ (𝐵 ∖ { 0 })∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏)) |
| 18 | 9, 17 | anbi12i 639 | . 2 ⊢ ((𝑅 ∈ NzRing ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏)) ↔ ((oppr‘𝑅) ∈ NzRing ∧ ∀𝑐 ∈ (𝐵 ∖ { 0 })∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏))) |
| 19 | 7, 8, 18 | 3bitr4i 306 | 1 ⊢ (𝑅 ∈ Domn ↔ (𝑅 ∈ NzRing ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∀𝑐 ∈ (𝐵 ∖ { 0 })((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ∀wral 3079 ∖ cdif 3903 {csn 4590 ‘cfv 6538 (class class class)co 7412 Basecbs 17270 .rcmulr 17312 0gc0g 17493 opprcoppr 20419 NzRingcnzr 20596 Domncdomn 20778 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-1st 7987 df-2nd 7988 df-tpos 8223 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-nn 12235 df-2 12304 df-3 12305 df-sets 17225 df-slot 17243 df-ndx 17255 df-base 17271 df-plusg 17324 df-mulr 17325 df-0g 17495 df-mgm 18699 df-sgrp 18778 df-mnd 18794 df-grp 19004 df-minusg 19005 df-sbg 19006 df-cmn 19853 df-abl 19854 df-mgp 20218 df-rng 20232 df-ur 20265 df-ring 20318 df-oppr 20420 df-nzr 20597 df-domn 20781 |
| This theorem is referenced by: domnrcanb 20807 |
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