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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 20436 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑋 ∈ LMod) |
4 | eqid 2733 | . . . 4 ⊢ (𝑋 ↾s 𝑉) = (𝑋 ↾s 𝑉) | |
5 | eqid 2733 | . . . 4 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
6 | lsslss.t | . . . 4 ⊢ 𝑇 = (LSubSp‘𝑋) | |
7 | 4, 5, 6 | islss3 20435 | . . 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 2733 | . . . . . . 7 ⊢ (Base‘𝑊) = (Base‘𝑊) | |
10 | 9, 2 | lssss 20412 | . . . . . 6 ⊢ (𝑈 ∈ 𝑆 → 𝑈 ⊆ (Base‘𝑊)) |
11 | 10 | adantl 483 | . . . . 5 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑈 ⊆ (Base‘𝑊)) |
12 | 1, 9 | ressbas2 17125 | . . . . 5 ⊢ (𝑈 ⊆ (Base‘𝑊) → 𝑈 = (Base‘𝑋)) |
13 | 11, 12 | syl 17 | . . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → 𝑈 = (Base‘𝑋)) |
14 | 13 | sseq2d 3977 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ⊆ 𝑈 ↔ 𝑉 ⊆ (Base‘𝑋))) |
15 | 14 | anbi1d 631 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ⊆ (Base‘𝑋) ∧ (𝑋 ↾s 𝑉) ∈ LMod))) |
16 | sstr2 3952 | . . . . . . 7 ⊢ (𝑉 ⊆ 𝑈 → (𝑈 ⊆ (Base‘𝑊) → 𝑉 ⊆ (Base‘𝑊))) | |
17 | 11, 16 | mpan9 508 | . . . . . 6 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → 𝑉 ⊆ (Base‘𝑊)) |
18 | 17 | biantrurd 534 | . . . . 5 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑊 ↾s 𝑉) ∈ LMod ↔ (𝑉 ⊆ (Base‘𝑊) ∧ (𝑊 ↾s 𝑉) ∈ LMod))) |
19 | 1 | oveq1i 7368 | . . . . . . 7 ⊢ (𝑋 ↾s 𝑉) = ((𝑊 ↾s 𝑈) ↾s 𝑉) |
20 | ressabs 17135 | . . . . . . . 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 | eqtrid 2785 | . . . . . 6 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → (𝑋 ↾s 𝑉) = (𝑊 ↾s 𝑉)) |
23 | 22 | eleq1d 2819 | . . . . 5 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑋 ↾s 𝑉) ∈ LMod ↔ (𝑊 ↾s 𝑉) ∈ LMod)) |
24 | eqid 2733 | . . . . . . 7 ⊢ (𝑊 ↾s 𝑉) = (𝑊 ↾s 𝑉) | |
25 | 24, 9, 2 | islss3 20435 | . . . . . 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 311 | . . . 4 ⊢ (((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) ∧ 𝑉 ⊆ 𝑈) → ((𝑋 ↾s 𝑉) ∈ LMod ↔ 𝑉 ∈ 𝑆)) |
28 | 27 | pm5.32da 580 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ⊆ 𝑈 ∧ 𝑉 ∈ 𝑆))) |
29 | 28 | biancomd 465 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ((𝑉 ⊆ 𝑈 ∧ (𝑋 ↾s 𝑉) ∈ LMod) ↔ (𝑉 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈))) |
30 | 8, 15, 29 | 3bitr2d 307 | 1 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑉 ∈ 𝑇 ↔ (𝑉 ∈ 𝑆 ∧ 𝑉 ⊆ 𝑈))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ⊆ wss 3911 ‘cfv 6497 (class class class)co 7358 Basecbs 17088 ↾s cress 17117 LModclmod 20336 LSubSpclss 20407 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5257 ax-nul 5264 ax-pow 5321 ax-pr 5385 ax-un 7673 ax-cnex 11112 ax-resscn 11113 ax-1cn 11114 ax-icn 11115 ax-addcl 11116 ax-addrcl 11117 ax-mulcl 11118 ax-mulrcl 11119 ax-mulcom 11120 ax-addass 11121 ax-mulass 11122 ax-distr 11123 ax-i2m1 11124 ax-1ne0 11125 ax-1rid 11126 ax-rnegex 11127 ax-rrecex 11128 ax-cnre 11129 ax-pre-lttri 11130 ax-pre-lttrn 11131 ax-pre-ltadd 11132 ax-pre-mulgt0 11133 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3352 df-reu 3353 df-rab 3407 df-v 3446 df-sbc 3741 df-csb 3857 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3930 df-nul 4284 df-if 4488 df-pw 4563 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4867 df-iun 4957 df-br 5107 df-opab 5169 df-mpt 5190 df-tr 5224 df-id 5532 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5589 df-we 5591 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-pred 6254 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6499 df-fn 6500 df-f 6501 df-f1 6502 df-fo 6503 df-f1o 6504 df-fv 6505 df-riota 7314 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7804 df-1st 7922 df-2nd 7923 df-frecs 8213 df-wrecs 8244 df-recs 8318 df-rdg 8357 df-er 8651 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11196 df-mnf 11197 df-xr 11198 df-ltxr 11199 df-le 11200 df-sub 11392 df-neg 11393 df-nn 12159 df-2 12221 df-3 12222 df-4 12223 df-5 12224 df-6 12225 df-sets 17041 df-slot 17059 df-ndx 17071 df-base 17089 df-ress 17118 df-plusg 17151 df-sca 17154 df-vsca 17155 df-0g 17328 df-mgm 18502 df-sgrp 18551 df-mnd 18562 df-grp 18756 df-minusg 18757 df-sbg 18758 df-subg 18930 df-mgp 19902 df-ur 19919 df-ring 19971 df-lmod 20338 df-lss 20408 |
This theorem is referenced by: lsslsp 20491 mplbas2 21459 mplind 21494 lcdlss 40128 lnmlsslnm 41451 lmhmlnmsplit 41457 |
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