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Mirrors > Home > MPE Home > Th. List > lsslss | Structured version Visualization version GIF version |
Description: The subspaces of a subspace are the smaller subspaces. (Contributed by Stefan O'Rear, 12-Dec-2014.) |
Ref | Expression |
---|---|
lsslss.x | ⊢ 𝑋 = (𝑊 ↾s 𝑈) |
lsslss.s | ⊢ 𝑆 = (LSubSp‘𝑊) |
lsslss.t | ⊢ 𝑇 = (LSubSp‘𝑋) |
Ref | Expression |
---|---|
lsslss | ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ∈ 𝑇 ↔ (𝑉 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lsslss.x | . . . 4 ⊢ 𝑋 = (𝑊 ↾s 𝑈) | |
2 | lsslss.s | . . . 4 ⊢ 𝑆 = (LSubSp‘𝑊) | |
3 | 1, 2 | lsslmod 19725 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ LMod) |
4 | eqid 2798 | . . . 4 ⊢ (𝑋 ↾s 𝑉) = (𝑋 ↾s 𝑉) | |
5 | eqid 2798 | . . . 4 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
6 | lsslss.t | . . . 4 ⊢ 𝑇 = (LSubSp‘𝑋) | |
7 | 4, 5, 6 | islss3 19724 | . . 3 ⊢ (𝑋 ∈ LMod → (𝑉 ∈ 𝑇 ↔ (𝑉 ⊆ (Base‘𝑋) ∧ (𝑋 ↾s 𝑉) ∈ LMod))) |
8 | 3, 7 | syl 17 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ∈ 𝑇 ↔ (𝑉 ⊆ (Base‘𝑋) ∧ (𝑋 ↾s 𝑉) ∈ LMod))) |
9 | eqid 2798 | . . . . . . 7 ⊢ (Base‘𝑊) = (Base‘𝑊) | |
10 | 9, 2 | lssss 19701 | . . . . . 6 ⊢ (𝑈 ∈ 𝑆 → 𝑈 ⊆ (Base‘𝑊)) |
11 | 10 | adantl 485 | . . . . 5 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑈 ⊆ (Base‘𝑊)) |
12 | 1, 9 | ressbas2 16547 | . . . . 5 ⊢ (𝑈 ⊆ (Base‘𝑊) → 𝑈 = (Base‘𝑋)) |
13 | 11, 12 | syl 17 | . . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑈 = (Base‘𝑋)) |
14 | 13 | sseq2d 3947 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ⊆ 𝑈 ↔ 𝑉 ⊆ (Base‘𝑋))) |
15 | 14 | anbi1d 632 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ⊆ (Base‘𝑋) ∧ (𝑋 ↾s 𝑉) ∈ LMod))) |
16 | sstr2 3922 | . . . . . . 7 ⊢ (𝑉 ⊆ 𝑈 → (𝑈 ⊆ (Base‘𝑊) → 𝑉 ⊆ (Base‘𝑊))) | |
17 | 11, 16 | mpan9 510 | . . . . . 6 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → 𝑉 ⊆ (Base‘𝑊)) |
18 | 17 | biantrurd 536 | . . . . 5 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑊 ↾s 𝑉) ∈ LMod ↔ (𝑉 ⊆ (Base‘𝑊) ∧ (𝑊 ↾s 𝑉) ∈ LMod))) |
19 | 1 | oveq1i 7145 | . . . . . . 7 ⊢ (𝑋 ↾s 𝑉) = ((𝑊 ↾s 𝑈) ↾s 𝑉) |
20 | ressabs 16555 | . . . . . . . 8 ⊢ ((𝑈 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈) → ((𝑊 ↾s 𝑈) ↾s 𝑉) = (𝑊 ↾s 𝑉)) | |
21 | 20 | adantll 713 | . . . . . . 7 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑊 ↾s 𝑈) ↾s 𝑉) = (𝑊 ↾s 𝑉)) |
22 | 19, 21 | syl5eq 2845 | . . . . . 6 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → (𝑋 ↾s 𝑉) = (𝑊 ↾s 𝑉)) |
23 | 22 | eleq1d 2874 | . . . . 5 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑋 ↾s 𝑉) ∈ LMod ↔ (𝑊 ↾s 𝑉) ∈ LMod)) |
24 | eqid 2798 | . . . . . . 7 ⊢ (𝑊 ↾s 𝑉) = (𝑊 ↾s 𝑉) | |
25 | 24, 9, 2 | islss3 19724 | . . . . . 6 ⊢ (𝑊 ∈ LMod → (𝑉 ∈ 𝑆 ↔ (𝑉 ⊆ (Base‘𝑊) ∧ (𝑊 ↾s 𝑉) ∈ LMod))) |
26 | 25 | ad2antrr 725 | . . . . 5 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → (𝑉 ∈ 𝑆 ↔ (𝑉 ⊆ (Base‘𝑊) ∧ (𝑊 ↾s 𝑉) ∈ LMod))) |
27 | 18, 23, 26 | 3bitr4d 314 | . . . 4 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑋 ↾s 𝑉) ∈ LMod ↔ 𝑉 ∈ 𝑆)) |
28 | 27 | pm5.32da 582 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ⊆ 𝑈 ∧ 𝑉 ∈ 𝑆))) |
29 | 28 | biancomd 467 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈))) |
30 | 8, 15, 29 | 3bitr2d 310 | 1 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ∈ 𝑇 ↔ (𝑉 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ⊆ wss 3881 ‘cfv 6324 (class class class)co 7135 Basecbs 16475 ↾s cress 16476 LModclmod 19627 LSubSpclss 19696 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-nn 11626 df-2 11688 df-3 11689 df-4 11690 df-5 11691 df-6 11692 df-ndx 16478 df-slot 16479 df-base 16481 df-sets 16482 df-ress 16483 df-plusg 16570 df-sca 16573 df-vsca 16574 df-0g 16707 df-mgm 17844 df-sgrp 17893 df-mnd 17904 df-grp 18098 df-minusg 18099 df-sbg 18100 df-subg 18268 df-mgp 19233 df-ur 19245 df-ring 19292 df-lmod 19629 df-lss 19697 |
This theorem is referenced by: lsslsp 19780 mplbas2 20710 mplind 20741 lcdlss 38915 lnmlsslnm 40025 lmhmlnmsplit 40031 |
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