| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > invrfvald | GIF version | ||
| Description: Multiplicative inverse function for a ring. (Contributed by NM, 21-Sep-2011.) (Revised by Mario Carneiro, 25-Dec-2014.) |
| Ref | Expression |
|---|---|
| invrfvald.u | ⊢ (𝜑 → 𝑈 = (Unit‘𝑅)) |
| invrfvald.g | ⊢ (𝜑 → 𝐺 = ((mulGrp‘𝑅) ↾s 𝑈)) |
| invrfvald.i | ⊢ (𝜑 → 𝐼 = (invr‘𝑅)) |
| invrfvald.r | ⊢ (𝜑 → 𝑅 ∈ Ring) |
| Ref | Expression |
|---|---|
| invrfvald | ⊢ (𝜑 → 𝐼 = (invg‘𝐺)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | invrfvald.u | . . . 4 ⊢ (𝜑 → 𝑈 = (Unit‘𝑅)) | |
| 2 | 1 | oveq2d 6033 | . . 3 ⊢ (𝜑 → ((mulGrp‘𝑅) ↾s 𝑈) = ((mulGrp‘𝑅) ↾s (Unit‘𝑅))) |
| 3 | 2 | fveq2d 5643 | . 2 ⊢ (𝜑 → (invg‘((mulGrp‘𝑅) ↾s 𝑈)) = (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 4 | invrfvald.g | . . 3 ⊢ (𝜑 → 𝐺 = ((mulGrp‘𝑅) ↾s 𝑈)) | |
| 5 | 4 | fveq2d 5643 | . 2 ⊢ (𝜑 → (invg‘𝐺) = (invg‘((mulGrp‘𝑅) ↾s 𝑈))) |
| 6 | invrfvald.i | . . 3 ⊢ (𝜑 → 𝐼 = (invr‘𝑅)) | |
| 7 | df-invr 14134 | . . . 4 ⊢ invr = (𝑟 ∈ V ↦ (invg‘((mulGrp‘𝑟) ↾s (Unit‘𝑟)))) | |
| 8 | fveq2 5639 | . . . . . 6 ⊢ (𝑟 = 𝑅 → (mulGrp‘𝑟) = (mulGrp‘𝑅)) | |
| 9 | fveq2 5639 | . . . . . 6 ⊢ (𝑟 = 𝑅 → (Unit‘𝑟) = (Unit‘𝑅)) | |
| 10 | 8, 9 | oveq12d 6035 | . . . . 5 ⊢ (𝑟 = 𝑅 → ((mulGrp‘𝑟) ↾s (Unit‘𝑟)) = ((mulGrp‘𝑅) ↾s (Unit‘𝑅))) |
| 11 | 10 | fveq2d 5643 | . . . 4 ⊢ (𝑟 = 𝑅 → (invg‘((mulGrp‘𝑟) ↾s (Unit‘𝑟))) = (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 12 | invrfvald.r | . . . . 5 ⊢ (𝜑 → 𝑅 ∈ Ring) | |
| 13 | 12 | elexd 2816 | . . . 4 ⊢ (𝜑 → 𝑅 ∈ V) |
| 14 | eqid 2231 | . . . . . . . 8 ⊢ (Unit‘𝑅) = (Unit‘𝑅) | |
| 15 | eqid 2231 | . . . . . . . 8 ⊢ ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) = ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) | |
| 16 | 14, 15 | unitgrp 14129 | . . . . . . 7 ⊢ (𝑅 ∈ Ring → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ Grp) |
| 17 | 12, 16 | syl 14 | . . . . . 6 ⊢ (𝜑 → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ Grp) |
| 18 | eqid 2231 | . . . . . . 7 ⊢ (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) = (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) | |
| 19 | eqid 2231 | . . . . . . 7 ⊢ (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) = (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) | |
| 20 | 18, 19 | grpinvfng 13626 | . . . . . 6 ⊢ (((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ Grp → (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) Fn (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 21 | 17, 20 | syl 14 | . . . . 5 ⊢ (𝜑 → (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) Fn (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 22 | basfn 13140 | . . . . . 6 ⊢ Base Fn V | |
| 23 | 17 | elexd 2816 | . . . . . 6 ⊢ (𝜑 → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ V) |
| 24 | funfvex 5656 | . . . . . . 7 ⊢ ((Fun Base ∧ ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ dom Base) → (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) | |
| 25 | 24 | funfni 5432 | . . . . . 6 ⊢ ((Base Fn V ∧ ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ V) → (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) |
| 26 | 22, 23, 25 | sylancr 414 | . . . . 5 ⊢ (𝜑 → (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) |
| 27 | fnex 5875 | . . . . 5 ⊢ (((invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) Fn (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∧ (Base‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) → (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) | |
| 28 | 21, 26, 27 | syl2anc 411 | . . . 4 ⊢ (𝜑 → (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅))) ∈ V) |
| 29 | 7, 11, 13, 28 | fvmptd3 5740 | . . 3 ⊢ (𝜑 → (invr‘𝑅) = (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 30 | 6, 29 | eqtrd 2264 | . 2 ⊢ (𝜑 → 𝐼 = (invg‘((mulGrp‘𝑅) ↾s (Unit‘𝑅)))) |
| 31 | 3, 5, 30 | 3eqtr4rd 2275 | 1 ⊢ (𝜑 → 𝐼 = (invg‘𝐺)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∈ wcel 2202 Vcvv 2802 Fn wfn 5321 ‘cfv 5326 (class class class)co 6017 Basecbs 13081 ↾s cress 13082 Grpcgrp 13582 invgcminusg 13583 mulGrpcmgp 13932 Ringcrg 14008 Unitcui 14099 invrcinvr 14133 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-addcom 8131 ax-addass 8133 ax-i2m1 8136 ax-0lt1 8137 ax-0id 8139 ax-rnegex 8140 ax-pre-ltirr 8143 ax-pre-lttrn 8145 ax-pre-ltadd 8147 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5970 df-ov 6020 df-oprab 6021 df-mpo 6022 df-tpos 6410 df-pnf 8215 df-mnf 8216 df-ltxr 8218 df-inn 9143 df-2 9201 df-3 9202 df-ndx 13084 df-slot 13085 df-base 13087 df-sets 13088 df-iress 13089 df-plusg 13172 df-mulr 13173 df-0g 13340 df-mgm 13438 df-sgrp 13484 df-mnd 13499 df-grp 13585 df-minusg 13586 df-cmn 13872 df-abl 13873 df-mgp 13933 df-ur 13972 df-srg 13976 df-ring 14010 df-oppr 14080 df-dvdsr 14101 df-unit 14102 df-invr 14134 |
| This theorem is referenced by: unitinvcl 14136 unitinvinv 14137 unitlinv 14139 unitrinv 14140 rdivmuldivd 14157 invrpropdg 14162 subrgugrp 14253 |
| Copyright terms: Public domain | W3C validator |