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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ringinveu | Structured version Visualization version GIF version | ||
| Description: If a ring unit element 𝑋 admits both a left inverse 𝑌 and a right inverse 𝑍, they are equal. (Contributed by Thierry Arnoux, 9-Mar-2025.) |
| Ref | Expression |
|---|---|
| isdrng4.b | ⊢ 𝐵 = (Base‘𝑅) |
| isdrng4.0 | ⊢ 0 = (0g‘𝑅) |
| isdrng4.1 | ⊢ 1 = (1r‘𝑅) |
| isdrng4.x | ⊢ · = (.r‘𝑅) |
| isdrng4.u | ⊢ 𝑈 = (Unit‘𝑅) |
| isdrng4.r | ⊢ (𝜑 → 𝑅 ∈ Ring) |
| ringinveu.1 | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| ringinveu.2 | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| ringinveu.3 | ⊢ (𝜑 → 𝑍 ∈ 𝐵) |
| ringinveu.4 | ⊢ (𝜑 → (𝑌 · 𝑋) = 1 ) |
| ringinveu.5 | ⊢ (𝜑 → (𝑋 · 𝑍) = 1 ) |
| Ref | Expression |
|---|---|
| ringinveu | ⊢ (𝜑 → 𝑍 = 𝑌) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ringinveu.5 | . . 3 ⊢ (𝜑 → (𝑋 · 𝑍) = 1 ) | |
| 2 | 1 | oveq2d 7427 | . 2 ⊢ (𝜑 → (𝑌 · (𝑋 · 𝑍)) = (𝑌 · 1 )) |
| 3 | ringinveu.4 | . . . 4 ⊢ (𝜑 → (𝑌 · 𝑋) = 1 ) | |
| 4 | 3 | oveq1d 7426 | . . 3 ⊢ (𝜑 → ((𝑌 · 𝑋) · 𝑍) = ( 1 · 𝑍)) |
| 5 | isdrng4.b | . . . 4 ⊢ 𝐵 = (Base‘𝑅) | |
| 6 | isdrng4.x | . . . 4 ⊢ · = (.r‘𝑅) | |
| 7 | isdrng4.r | . . . 4 ⊢ (𝜑 → 𝑅 ∈ Ring) | |
| 8 | ringinveu.2 | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 9 | ringinveu.1 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 10 | ringinveu.3 | . . . 4 ⊢ (𝜑 → 𝑍 ∈ 𝐵) | |
| 11 | 5, 6, 7, 8, 9, 10 | ringassd 20339 | . . 3 ⊢ (𝜑 → ((𝑌 · 𝑋) · 𝑍) = (𝑌 · (𝑋 · 𝑍))) |
| 12 | isdrng4.1 | . . . 4 ⊢ 1 = (1r‘𝑅) | |
| 13 | 5, 6, 12, 7, 10 | ringlidmd 20355 | . . 3 ⊢ (𝜑 → ( 1 · 𝑍) = 𝑍) |
| 14 | 4, 11, 13 | 3eqtr3d 2812 | . 2 ⊢ (𝜑 → (𝑌 · (𝑋 · 𝑍)) = 𝑍) |
| 15 | 5, 6, 12, 7, 8 | ringridmd 20356 | . 2 ⊢ (𝜑 → (𝑌 · 1 ) = 𝑌) |
| 16 | 2, 14, 15 | 3eqtr3d 2812 | 1 ⊢ (𝜑 → 𝑍 = 𝑌) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 ‘cfv 6537 (class class class)co 7411 Basecbs 17269 .rcmulr 17311 0gc0g 17492 1rcur 20263 Ringcrg 20315 Unitcui 20437 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-i2m1 11168 ax-1ne0 11169 ax-1rid 11170 ax-rnegex 11171 ax-rrecex 11172 ax-cnre 11173 ax-pre-lttri 11174 ax-pre-lttrn 11175 ax-pre-ltadd 11176 ax-pre-mulgt0 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7863 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-er 8694 df-en 8944 df-dom 8945 df-sdom 8946 df-pnf 11245 df-mnf 11246 df-xr 11247 df-ltxr 11248 df-le 11249 df-sub 11443 df-neg 11444 df-nn 12234 df-2 12303 df-sets 17224 df-slot 17242 df-ndx 17254 df-base 17270 df-plusg 17323 df-0g 17494 df-mgm 18698 df-sgrp 18777 df-mnd 18793 df-mgp 20217 df-ur 20264 df-ring 20317 |
| This theorem is referenced by: isdrng4 33559 drngidl 33685 qsdrngi 33722 |
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