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| Mirrors > Home > MPE Home > Th. List > cphabscl | Structured version Visualization version GIF version | ||
| Description: The scalar field of a subcomplex pre-Hilbert space is closed under the absolute value operation. (Contributed by Mario Carneiro, 11-Oct-2015.) |
| Ref | Expression |
|---|---|
| cphsca.f | ⊢ 𝐹 = (Scalar‘𝑊) |
| cphsca.k | ⊢ 𝐾 = (Base‘𝐹) |
| Ref | Expression |
|---|---|
| cphabscl | ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (abs‘𝐴) ∈ 𝐾) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cphsca.f | . . . . . 6 ⊢ 𝐹 = (Scalar‘𝑊) | |
| 2 | cphsca.k | . . . . . 6 ⊢ 𝐾 = (Base‘𝐹) | |
| 3 | 1, 2 | cphsubrg 25412 | . . . . 5 ⊢ (𝑊 ∈ ℂPreHil → 𝐾 ∈ (SubRing‘ℂfld)) |
| 4 | cnfldbas 21593 | . . . . . 6 ⊢ ℂ = (Base‘ℂfld) | |
| 5 | 4 | subrgss 20738 | . . . . 5 ⊢ (𝐾 ∈ (SubRing‘ℂfld) → 𝐾 ⊆ ℂ) |
| 6 | 3, 5 | syl 18 | . . . 4 ⊢ (𝑊 ∈ ℂPreHil → 𝐾 ⊆ ℂ) |
| 7 | 6 | sselda 3934 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 𝐴 ∈ ℂ) |
| 8 | absval 15327 | . . 3 ⊢ (𝐴 ∈ ℂ → (abs‘𝐴) = (√‘(𝐴 · (∗‘𝐴)))) | |
| 9 | 7, 8 | syl 18 | . 2 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (abs‘𝐴) = (√‘(𝐴 · (∗‘𝐴)))) |
| 10 | simpl 488 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 𝑊 ∈ ℂPreHil) | |
| 11 | 3 | adantr 486 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 𝐾 ∈ (SubRing‘ℂfld)) |
| 12 | simpr 490 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 𝐴 ∈ 𝐾) | |
| 13 | 1, 2 | cphcjcl 25415 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (∗‘𝐴) ∈ 𝐾) |
| 14 | cnfldmul 21597 | . . . . 5 ⊢ · = (.r‘ℂfld) | |
| 15 | 14 | subrgmcl 20750 | . . . 4 ⊢ ((𝐾 ∈ (SubRing‘ℂfld) ∧ 𝐴 ∈ 𝐾 ∧ (∗‘𝐴) ∈ 𝐾) → (𝐴 · (∗‘𝐴)) ∈ 𝐾) |
| 16 | 11, 12, 13, 15 | syl3anc 1398 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (𝐴 · (∗‘𝐴)) ∈ 𝐾) |
| 17 | 7 | cjmulrcld 15295 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (𝐴 · (∗‘𝐴)) ∈ ℝ) |
| 18 | 7 | cjmulge0d 15297 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 0 ≤ (𝐴 · (∗‘𝐴))) |
| 19 | 1, 2 | cphsqrtcl 25416 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ ((𝐴 · (∗‘𝐴)) ∈ 𝐾 ∧ (𝐴 · (∗‘𝐴)) ∈ ℝ ∧ 0 ≤ (𝐴 · (∗‘𝐴)))) → (√‘(𝐴 · (∗‘𝐴))) ∈ 𝐾) |
| 20 | 10, 16, 17, 18, 19 | syl13anc 1399 | . 2 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (√‘(𝐴 · (∗‘𝐴))) ∈ 𝐾) |
| 21 | 9, 20 | eqeltrd 2862 | 1 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (abs‘𝐴) ∈ 𝐾) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ⊆ wss 3902 class class class wbr 5107 ‘cfv 6537 (class class class)co 7416 ℂcc 11125 ℝcr 11126 0cc0 11127 · cmul 11132 ≤ cle 11271 ∗ccj 15185 √csqrt 15322 abscabs 15323 Basecbs 17305 Scalarcsca 17349 SubRingcsubrg 20735 ℂfldccnfld 21589 ℂPreHilccph 25398 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 ax-addf 11206 ax-mulf 11207 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 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 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-1st 7989 df-2nd 7990 df-tpos 8227 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8458 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9415 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-dec 12740 df-uz 12891 df-rp 13045 df-ico 13406 df-fz 13564 df-seq 14068 df-exp 14128 df-cj 15188 df-re 15189 df-im 15190 df-sqrt 15324 df-abs 15325 df-struct 17243 df-sets 17260 df-slot 17278 df-ndx 17290 df-base 17306 df-ress 17327 df-plusg 17359 df-mulr 17360 df-starv 17361 df-tset 17365 df-ple 17366 df-ds 17368 df-unif 17369 df-0g 17530 df-mgm 18734 df-sgrp 18825 df-mnd 18841 df-mhm 18895 df-grp 19064 df-minusg 19065 df-subg 19250 df-ghm 19345 df-cmn 19913 df-abl 19914 df-mgp 20278 df-rng 20292 df-ur 20325 df-ring 20378 df-cring 20379 df-oppr 20482 df-dvdsr 20502 df-unit 20503 df-rhm 20617 df-subrng 20712 df-subrg 20736 df-drng 20896 df-staf 21009 df-srng 21010 df-lvec 21291 df-cnfld 21590 df-phl 21843 df-cph 25400 |
| This theorem is used by: cphsqrtcl2 25418 |
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