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| Mirrors > Home > MPE Home > Th. List > invrcn | 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 the field. (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 |
|---|---|
| invrcn | ⊢ (𝑅 ∈ TopDRing → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn 𝐽)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tdrgtps 24497 | . . 3 ⊢ (𝑅 ∈ TopDRing → 𝑅 ∈ TopSp) | |
| 2 | mulrcn.j | . . . 4 ⊢ 𝐽 = (TopOpen‘𝑅) | |
| 3 | 2 | tpstop 23256 | . . 3 ⊢ (𝑅 ∈ TopSp → 𝐽 ∈ Top) |
| 4 | cnrest2r 23606 | . . 3 ⊢ (𝐽 ∈ Top → ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈)) ⊆ ((𝐽 ↾t 𝑈) Cn 𝐽)) | |
| 5 | 1, 3, 4 | 3syl 19 | . 2 ⊢ (𝑅 ∈ TopDRing → ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈)) ⊆ ((𝐽 ↾t 𝑈) Cn 𝐽)) |
| 6 | invrcn.i | . . 3 ⊢ 𝐼 = (invr‘𝑅) | |
| 7 | invrcn.u | . . 3 ⊢ 𝑈 = (Unit‘𝑅) | |
| 8 | 2, 6, 7 | invrcn2 24500 | . 2 ⊢ (𝑅 ∈ TopDRing → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn (𝐽 ↾t 𝑈))) |
| 9 | 5, 8 | sseldd 3930 | 1 ⊢ (𝑅 ∈ TopDRing → 𝐼 ∈ ((𝐽 ↾t 𝑈) Cn 𝐽)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ⊆ wss 3914 ‘cfv 6539 (class class class)co 7421 ↾t crest 17592 TopOpenctopn 17593 Unitcui 20586 invrcinvr 20618 Topctop 23212 TopSpctps 23251 Cn ccn 23543 TopDRingctdrg 24477 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-er 8718 df-map 8850 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-fi 9404 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-nn 12337 df-2 12406 df-3 12407 df-4 12408 df-5 12409 df-6 12410 df-7 12411 df-8 12412 df-9 12413 df-sets 17343 df-slot 17361 df-ndx 17373 df-base 17389 df-ress 17410 df-plusg 17442 df-tset 17448 df-rest 17594 df-topn 17595 df-topgen 17615 df-minusg 19149 df-mgp 20362 df-invr 20619 df-top 23213 df-topon 23230 df-topsp 23252 df-bases 23265 df-cn 23546 df-tmd 24392 df-tgp 24393 df-trg 24480 df-tdrg 24481 |
| This theorem is used by: dvrcn 24504 |
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