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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 25408 | . . . . 5 ⊢ (𝑊 ∈ ℂPreHil → 𝐾 ∈ (SubRing‘ℂfld)) |
| 4 | cnfldbas 21589 | . . . . . 6 ⊢ ℂ = (Base‘ℂfld) | |
| 5 | 4 | subrgss 20734 | . . . . 5 ⊢ (𝐾 ∈ (SubRing‘ℂfld) → 𝐾 ⊆ ℂ) |
| 6 | 3, 5 | syl 18 | . . . 4 ⊢ (𝑊 ∈ ℂPreHil → 𝐾 ⊆ ℂ) |
| 7 | 6 | sselda 3931 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 𝐴 ∈ ℂ) |
| 8 | absval 15325 | . . 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 25411 | . . . 4 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (∗‘𝐴) ∈ 𝐾) |
| 14 | cnfldmul 21593 | . . . . 5 ⊢ · = (.r‘ℂfld) | |
| 15 | 14 | subrgmcl 20746 | . . . 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 15293 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → (𝐴 · (∗‘𝐴)) ∈ ℝ) |
| 18 | 7 | cjmulge0d 15295 | . . 3 ⊢ ((𝑊 ∈ ℂPreHil ∧ 𝐴 ∈ 𝐾) → 0 ≤ (𝐴 · (∗‘𝐴))) |
| 19 | 1, 2 | cphsqrtcl 25412 | . . 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 2860 | 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 3899 class class class wbr 5103 ‘cfv 6533 (class class class)co 7413 ℂcc 11122 ℝcr 11123 0cc0 11124 · cmul 11129 ≤ cle 11268 ∗ccj 15183 √csqrt 15320 abscabs 15321 Basecbs 17301 Scalarcsca 17345 SubRingcsubrg 20731 ℂfldccnfld 21585 ℂPreHilccph 25394 |
| 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 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 ax-pre-sup 11202 ax-addf 11203 ax-mulf 11204 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-tpos 8224 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-sup 9412 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-div 11896 df-nn 12258 df-2 12327 df-3 12328 df-4 12329 df-5 12330 df-6 12331 df-7 12332 df-8 12333 df-9 12334 df-n0 12529 df-z 12616 df-dec 12737 df-uz 12888 df-rp 13043 df-ico 13404 df-fz 13562 df-seq 14066 df-exp 14126 df-cj 15186 df-re 15187 df-im 15188 df-sqrt 15322 df-abs 15323 df-struct 17239 df-sets 17256 df-slot 17274 df-ndx 17286 df-base 17302 df-ress 17323 df-plusg 17355 df-mulr 17356 df-starv 17357 df-tset 17361 df-ple 17362 df-ds 17364 df-unif 17365 df-0g 17526 df-mgm 18730 df-sgrp 18821 df-mnd 18837 df-mhm 18891 df-grp 19060 df-minusg 19061 df-subg 19246 df-ghm 19341 df-cmn 19909 df-abl 19910 df-mgp 20274 df-rng 20288 df-ur 20321 df-ring 20374 df-cring 20375 df-oppr 20478 df-dvdsr 20498 df-unit 20499 df-rhm 20613 df-subrng 20708 df-subrg 20732 df-drng 20892 df-staf 21005 df-srng 21006 df-lvec 21287 df-cnfld 21586 df-phl 21839 df-cph 25396 |
| This theorem is used by: cphsqrtcl2 25414 |
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