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| Mirrors > Home > MPE Home > Th. List > invrcn2 | Structured version Visualization version GIF version | ||
| Description: The multiplicative inverse function is a continuous function from the unit group (that is, the nonzero numbers) to itself. (Contributed by Mario Carneiro, 5-Oct-2015.) |
| Ref | Expression |
|---|---|
| mulrcn.j | ⊢ 𝐽 = (TopOpen‘𝑅) |
| invrcn.i | ⊢ 𝐼 = (invr‘𝑅) |
| invrcn.u | ⊢ 𝑈 = (Unit‘𝑅) |
| Ref | Expression |
|---|---|
| invrcn2 | ⊢ (𝑅 ∈ TopDRing → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2733 | . . 3 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅) | |
| 2 | invrcn.u | . . 3 ⊢ 𝑈 = (Unit‘𝑅) | |
| 3 | 1, 2 | tdrgunit 24083 | . 2 ⊢ (𝑅 ∈ TopDRing → ((mulGrp‘𝑅) ↾s 𝑈) ∈ TopGrp) |
| 4 | eqid 2733 | . . . 4 ⊢ ((mulGrp‘𝑅) ↾s 𝑈) = ((mulGrp‘𝑅) ↾s 𝑈) | |
| 5 | mulrcn.j | . . . . 5 ⊢ 𝐽 = (TopOpen‘𝑅) | |
| 6 | 1, 5 | mgptopn 20068 | . . . 4 ⊢ 𝐽 = (TopOpen‘(mulGrp‘𝑅)) |
| 7 | 4, 6 | resstopn 23102 | . . 3 ⊢ (𝐽 ↾t 𝑈) = (TopOpen‘((mulGrp‘𝑅) ↾s 𝑈)) |
| 8 | invrcn.i | . . . 4 ⊢ 𝐼 = (invr‘𝑅) | |
| 9 | 2, 4, 8 | invrfval 20309 | . . 3 ⊢ 𝐼 = (invg‘((mulGrp‘𝑅) ↾s 𝑈)) |
| 10 | 7, 9 | tgpinv 24001 | . 2 ⊢ (((mulGrp‘𝑅) ↾s 𝑈) ∈ TopGrp → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈))) |
| 11 | 3, 10 | syl 17 | 1 ⊢ (𝑅 ∈ TopDRing → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ‘cfv 6486 (class class class)co 7352 ↾s cress 17143 ↾t crest 17326 TopOpenctopn 17327 mulGrpcmgp 20060 Unitcui 20275 invrcinvr 20307 Cn ccn 23140 TopGrpctgp 23987 TopDRingctdrg 24073 |
| 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 2705 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11069 ax-resscn 11070 ax-1cn 11071 ax-icn 11072 ax-addcl 11073 ax-addrcl 11074 ax-mulcl 11075 ax-mulrcl 11076 ax-mulcom 11077 ax-addass 11078 ax-mulass 11079 ax-distr 11080 ax-i2m1 11081 ax-1ne0 11082 ax-1rid 11083 ax-rnegex 11084 ax-rrecex 11085 ax-cnre 11086 ax-pre-lttri 11087 ax-pre-lttrn 11088 ax-pre-ltadd 11089 ax-pre-mulgt0 11090 |
| 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 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7309 df-ov 7355 df-oprab 7356 df-mpo 7357 df-om 7803 df-1st 7927 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-er 8628 df-en 8876 df-dom 8877 df-sdom 8878 df-pnf 11155 df-mnf 11156 df-xr 11157 df-ltxr 11158 df-le 11159 df-sub 11353 df-neg 11354 df-nn 12133 df-2 12195 df-3 12196 df-4 12197 df-5 12198 df-6 12199 df-7 12200 df-8 12201 df-9 12202 df-sets 17077 df-slot 17095 df-ndx 17107 df-base 17123 df-ress 17144 df-plusg 17176 df-tset 17182 df-rest 17328 df-topn 17329 df-minusg 18852 df-mgp 20061 df-invr 20308 df-tgp 23989 df-tdrg 24077 |
| This theorem is referenced by: invrcn 24097 |
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