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Mirrors > Home > MPE Home > Th. List > lssnvc | Structured version Visualization version GIF version |
Description: A subspace of a normed vector space is a normed vector space. (Contributed by Mario Carneiro, 4-Oct-2015.) |
Ref | Expression |
---|---|
lssnlm.x | ⊢ 𝑋 = (𝑊 ↾s 𝑈) |
lssnlm.s | ⊢ 𝑆 = (LSubSp‘𝑊) |
Ref | Expression |
---|---|
lssnvc | ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ NrmVec) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nvcnlm 23305 | . . 3 ⊢ (𝑊 ∈ NrmVec → 𝑊 ∈ NrmMod) | |
2 | lssnlm.x | . . . 4 ⊢ 𝑋 = (𝑊 ↾s 𝑈) | |
3 | lssnlm.s | . . . 4 ⊢ 𝑆 = (LSubSp‘𝑊) | |
4 | 2, 3 | lssnlm 23310 | . . 3 ⊢ ((𝑊 ∈ NrmMod ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ NrmMod) |
5 | 1, 4 | sylan 582 | . 2 ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ NrmMod) |
6 | eqid 2821 | . . . . 5 ⊢ (Scalar‘𝑊) = (Scalar‘𝑊) | |
7 | 2, 6 | resssca 16650 | . . . 4 ⊢ (𝑈 ∈ 𝑆 → (Scalar‘𝑊) = (Scalar‘𝑋)) |
8 | 7 | adantl 484 | . . 3 ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → (Scalar‘𝑊) = (Scalar‘𝑋)) |
9 | nvclvec 23306 | . . . . 5 ⊢ (𝑊 ∈ NrmVec → 𝑊 ∈ LVec) | |
10 | 6 | lvecdrng 19877 | . . . . 5 ⊢ (𝑊 ∈ LVec → (Scalar‘𝑊) ∈ DivRing) |
11 | 9, 10 | syl 17 | . . . 4 ⊢ (𝑊 ∈ NrmVec → (Scalar‘𝑊) ∈ DivRing) |
12 | 11 | adantr 483 | . . 3 ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → (Scalar‘𝑊) ∈ DivRing) |
13 | 8, 12 | eqeltrrd 2914 | . 2 ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → (Scalar‘𝑋) ∈ DivRing) |
14 | eqid 2821 | . . 3 ⊢ (Scalar‘𝑋) = (Scalar‘𝑋) | |
15 | 14 | isnvc2 23308 | . 2 ⊢ (𝑋 ∈ NrmVec ↔ (𝑋 ∈ NrmMod ∧ (Scalar‘𝑋) ∈ DivRing)) |
16 | 5, 13, 15 | sylanbrc 585 | 1 ⊢ ((𝑊 ∈ NrmVec ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ NrmVec) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ‘cfv 6355 (class class class)co 7156 ↾s cress 16484 Scalarcsca 16568 DivRingcdr 19502 LSubSpclss 19703 LVecclvec 19874 NrmModcnlm 23190 NrmVeccnvc 23191 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 ax-pre-sup 10615 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-er 8289 df-map 8408 df-en 8510 df-dom 8511 df-sdom 8512 df-sup 8906 df-inf 8907 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-div 11298 df-nn 11639 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 df-9 11708 df-n0 11899 df-z 11983 df-dec 12100 df-uz 12245 df-q 12350 df-rp 12391 df-xneg 12508 df-xadd 12509 df-xmul 12510 df-ndx 16486 df-slot 16487 df-base 16489 df-sets 16490 df-ress 16491 df-plusg 16578 df-sca 16581 df-vsca 16582 df-tset 16584 df-ds 16587 df-rest 16696 df-topn 16697 df-0g 16715 df-topgen 16717 df-mgm 17852 df-sgrp 17901 df-mnd 17912 df-grp 18106 df-minusg 18107 df-sbg 18108 df-subg 18276 df-mgp 19240 df-ur 19252 df-ring 19299 df-lmod 19636 df-lss 19704 df-lvec 19875 df-psmet 20537 df-xmet 20538 df-met 20539 df-bl 20540 df-mopn 20541 df-top 21502 df-topon 21519 df-topsp 21541 df-bases 21554 df-xms 22930 df-ms 22931 df-nm 23192 df-ngp 23193 df-nlm 23196 df-nvc 23197 |
This theorem is referenced by: lssbn 23955 cmslssbn 23975 |
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