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| Mirrors > Home > MPE Home > Th. List > cphdivcl | Structured version Visualization version GIF version | ||
| Description: The scalar field of a subcomplex pre-Hilbert space is closed under reciprocal. (Contributed by Mario Carneiro, 11-Oct-2015.) |
| Ref | Expression |
|---|---|
| cphsca.f | ⊢ 𝐹 = (Scalar‘𝑊) |
| cphsca.k | ⊢ 𝐾 = (Base‘𝐹) |
| Ref | Expression |
|---|---|
| cphdivcl | ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → (𝐴 / 𝐵) ∈ 𝐾) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cphsca.f | . . . . . . 7 ⊢ 𝐹 = (Scalar‘𝑊) | |
| 2 | cphsca.k | . . . . . . 7 ⊢ 𝐾 = (Base‘𝐹) | |
| 3 | 1, 2 | cphsubrg 25127 | . . . . . 6 ⊢ (𝑊 ∈ ℂPreHil → 𝐾 ∈ (SubRing‘ℂfld)) |
| 4 | 3 | adantr 480 | . . . . 5 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐾 ∈ (SubRing‘ℂfld)) |
| 5 | cnfldbas 21304 | . . . . . 6 ⊢ ℂ = (Base‘ℂfld) | |
| 6 | 5 | subrgss 20496 | . . . . 5 ⊢ (𝐾 ∈ (SubRing‘ℂfld) → 𝐾 ⊆ ℂ) |
| 7 | 4, 6 | syl 17 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐾 ⊆ ℂ) |
| 8 | simpr1 1195 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐴 ∈ 𝐾) | |
| 9 | 7, 8 | sseldd 3931 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐴 ∈ ℂ) |
| 10 | simpr2 1196 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐵 ∈ 𝐾) | |
| 11 | 7, 10 | sseldd 3931 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐵 ∈ ℂ) |
| 12 | simpr3 1197 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → 𝐵 ≠ 0) | |
| 13 | 9, 11, 12 | divrecd 11911 | . 2 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → (𝐴 / 𝐵) = (𝐴 · (1 / 𝐵))) |
| 14 | 1, 2 | cphreccl 25128 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0) → (1 / 𝐵) ∈ 𝐾) |
| 15 | 14 | 3adant3r1 1183 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → (1 / 𝐵) ∈ 𝐾) |
| 16 | cnfldmul 21308 | . . . 4 ⊢ · = (.r‘ℂfld) | |
| 17 | 16 | subrgmcl 20508 | . . 3 ⊢ ((𝐾 ∈ (SubRing‘ℂfld) ∧ 𝐴 ∈ 𝐾 ∧ (1 / 𝐵) ∈ 𝐾) → (𝐴 · (1 / 𝐵)) ∈ 𝐾) |
| 18 | 4, 8, 15, 17 | syl3anc 1373 | . 2 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → (𝐴 · (1 / 𝐵)) ∈ 𝐾) |
| 19 | 13, 18 | eqeltrd 2833 | 1 ⊢ ((𝑊 ∈ ℂPreHil ∧ (𝐴 ∈ 𝐾 ∧ 𝐵 ∈ 𝐾 ∧ 𝐵 ≠ 0)) → (𝐴 / 𝐵) ∈ 𝐾) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ≠ wne 2929 ⊆ wss 3898 ‘cfv 6489 (class class class)co 7355 ℂcc 11015 0cc0 11017 1c1 11018 · cmul 11022 / cdiv 11785 Basecbs 17127 Scalarcsca 17171 SubRingcsubrg 20493 ℂfldccnfld 21300 ℂPreHilccph 25113 |
| 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 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 ax-cnex 11073 ax-resscn 11074 ax-1cn 11075 ax-icn 11076 ax-addcl 11077 ax-addrcl 11078 ax-mulcl 11079 ax-mulrcl 11080 ax-mulcom 11081 ax-addass 11082 ax-mulass 11083 ax-distr 11084 ax-i2m1 11085 ax-1ne0 11086 ax-1rid 11087 ax-rnegex 11088 ax-rrecex 11089 ax-cnre 11090 ax-pre-lttri 11091 ax-pre-lttrn 11092 ax-pre-ltadd 11093 ax-pre-mulgt0 11094 ax-addf 11096 ax-mulf 11097 |
| 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-rmo 3347 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 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-tp 4582 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7312 df-ov 7358 df-oprab 7359 df-mpo 7360 df-om 7806 df-1st 7930 df-2nd 7931 df-tpos 8165 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-1o 8394 df-er 8631 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-pnf 11159 df-mnf 11160 df-xr 11161 df-ltxr 11162 df-le 11163 df-sub 11357 df-neg 11358 df-div 11786 df-nn 12137 df-2 12199 df-3 12200 df-4 12201 df-5 12202 df-6 12203 df-7 12204 df-8 12205 df-9 12206 df-n0 12393 df-z 12480 df-dec 12599 df-uz 12743 df-fz 13415 df-seq 13916 df-exp 13976 df-struct 17065 df-sets 17082 df-slot 17100 df-ndx 17112 df-base 17128 df-ress 17149 df-plusg 17181 df-mulr 17182 df-starv 17183 df-tset 17187 df-ple 17188 df-ds 17190 df-unif 17191 df-0g 17352 df-mgm 18556 df-sgrp 18635 df-mnd 18651 df-grp 18857 df-minusg 18858 df-subg 19044 df-cmn 19702 df-abl 19703 df-mgp 20067 df-rng 20079 df-ur 20108 df-ring 20161 df-cring 20162 df-oppr 20264 df-dvdsr 20284 df-unit 20285 df-invr 20315 df-dvr 20328 df-subrng 20470 df-subrg 20494 df-drng 20655 df-lvec 21046 df-cnfld 21301 df-phl 21572 df-cph 25115 |
| This theorem is referenced by: cphsqrtcl2 25133 pjthlem1 25384 |
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