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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 2761 | . . . 4 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
| 2 | isdomn4r.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 3 | 1, 2 | opprbas 20378 | . . 3 ⊢ 𝐵 = (Base‘(oppr‘𝑅)) |
| 4 | isdomn4r.0 | . . . 4 ⊢ 0 = (0g‘𝑅) | |
| 5 | 1, 4 | oppr0 20384 | . . 3 ⊢ 0 = (0g‘(oppr‘𝑅)) |
| 6 | eqid 2761 | . . 3 ⊢ (.r‘(oppr‘𝑅)) = (.r‘(oppr‘𝑅)) | |
| 7 | 3, 5, 6 | isdomn4 20752 | . 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 20753 | . 2 ⊢ (𝑅 ∈ Domn ↔ (oppr‘𝑅) ∈ Domn) |
| 9 | 1 | opprnzrb 20557 | . . 3 ⊢ (𝑅 ∈ NzRing ↔ (oppr‘𝑅) ∈ NzRing) |
| 10 | isdomn4r.x | . . . . . . . 8 ⊢ · = (.r‘𝑅) | |
| 11 | 2, 10, 1, 6 | opprmul 20375 | . . . . . . 7 ⊢ (𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑎 · 𝑐) |
| 12 | 2, 10, 1, 6 | opprmul 20375 | . . . . . . 7 ⊢ (𝑐(.r‘(oppr‘𝑅))𝑏) = (𝑏 · 𝑐) |
| 13 | 11, 12 | eqeq12i 2779 | . . . . . 6 ⊢ ((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) ↔ (𝑎 · 𝑐) = (𝑏 · 𝑐)) |
| 14 | 13 | imbi1i 351 | . . . . 5 ⊢ (((𝑐(.r‘(oppr‘𝑅))𝑎) = (𝑐(.r‘(oppr‘𝑅))𝑏) → 𝑎 = 𝑏) ↔ ((𝑎 · 𝑐) = (𝑏 · 𝑐) → 𝑎 = 𝑏)) |
| 15 | 14 | 3ralbii 3138 | . . . 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 3292 | . . . 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 279 | . . 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 637 | . 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 305 | 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 208 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ∀wral 3075 ∖ cdif 3899 {csn 4579 ‘cfv 6515 (class class class)co 7390 Basecbs 17235 .rcmulr 17277 0gc0g 17458 opprcoppr 20371 NzRingcnzr 20548 Domncdomn 20728 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-cnex 11122 ax-resscn 11123 ax-1cn 11124 ax-icn 11125 ax-addcl 11126 ax-addrcl 11127 ax-mulcl 11128 ax-mulrcl 11129 ax-mulcom 11130 ax-addass 11131 ax-mulass 11132 ax-distr 11133 ax-i2m1 11134 ax-1ne0 11135 ax-1rid 11136 ax-rnegex 11137 ax-rrecex 11138 ax-cnre 11139 ax-pre-lttri 11140 ax-pre-lttrn 11141 ax-pre-ltadd 11142 ax-pre-mulgt0 11143 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7841 df-1st 7964 df-2nd 7965 df-tpos 8199 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 df-sub 11409 df-neg 11410 df-nn 12204 df-2 12273 df-3 12274 df-sets 17190 df-slot 17208 df-ndx 17220 df-base 17236 df-plusg 17289 df-mulr 17290 df-0g 17460 df-mgm 18664 df-sgrp 18743 df-mnd 18759 df-grp 18968 df-minusg 18969 df-sbg 18970 df-cmn 19812 df-abl 19813 df-mgp 20177 df-rng 20189 df-ur 20218 df-ring 20271 df-oppr 20372 df-nzr 20549 df-domn 20731 |
| This theorem is referenced by: domnrcanb 20758 |
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