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Mirrors > Home > MPE Home > Th. List > lssincl | Structured version Visualization version GIF version |
Description: The intersection of two subspaces is a subspace. (Contributed by NM, 7-Mar-2014.) (Revised by Mario Carneiro, 19-Jun-2014.) |
Ref | Expression |
---|---|
lssintcl.s | ⊢ 𝑆 = (LSubSp‘𝑊) |
Ref | Expression |
---|---|
lssincl | ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → (𝑇 ∩ 𝑈) ∈ 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | intprg 4985 | . . 3 ⊢ ((𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} = (𝑇 ∩ 𝑈)) | |
2 | 1 | 3adant1 1129 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} = (𝑇 ∩ 𝑈)) |
3 | simp1 1135 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → 𝑊 ∈ LMod) | |
4 | prssi 4825 | . . . 4 ⊢ ((𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ⊆ 𝑆) | |
5 | 4 | 3adant1 1129 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ⊆ 𝑆) |
6 | prnzg 4782 | . . . 4 ⊢ (𝑇 ∈ 𝑆 → {𝑇, 𝑈} ≠ ∅) | |
7 | 6 | 3ad2ant2 1133 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ≠ ∅) |
8 | lssintcl.s | . . . 4 ⊢ 𝑆 = (LSubSp‘𝑊) | |
9 | 8 | lssintcl 20979 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ {𝑇, 𝑈} ⊆ 𝑆 ∧ {𝑇, 𝑈} ≠ ∅) → ∩ {𝑇, 𝑈} ∈ 𝑆) |
10 | 3, 5, 7, 9 | syl3anc 1370 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} ∈ 𝑆) |
11 | 2, 10 | eqeltrrd 2839 | 1 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → (𝑇 ∩ 𝑈) ∈ 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1536 ∈ wcel 2105 ≠ wne 2937 ∩ cin 3961 ⊆ wss 3962 ∅c0 4338 {cpr 4632 ∩ cint 4950 ‘cfv 6562 LModclmod 20874 LSubSpclss 20946 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-sep 5301 ax-nul 5311 ax-pow 5370 ax-pr 5437 ax-un 7753 ax-cnex 11208 ax-resscn 11209 ax-1cn 11210 ax-icn 11211 ax-addcl 11212 ax-addrcl 11213 ax-mulcl 11214 ax-mulrcl 11215 ax-mulcom 11216 ax-addass 11217 ax-mulass 11218 ax-distr 11219 ax-i2m1 11220 ax-1ne0 11221 ax-1rid 11222 ax-rnegex 11223 ax-rrecex 11224 ax-cnre 11225 ax-pre-lttri 11226 ax-pre-lttrn 11227 ax-pre-ltadd 11228 ax-pre-mulgt0 11229 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3377 df-reu 3378 df-rab 3433 df-v 3479 df-sbc 3791 df-csb 3908 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-pss 3982 df-nul 4339 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-int 4951 df-iun 4997 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5640 df-we 5642 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-pred 6322 df-ord 6388 df-on 6389 df-lim 6390 df-suc 6391 df-iota 6515 df-fun 6564 df-fn 6565 df-f 6566 df-f1 6567 df-fo 6568 df-f1o 6569 df-fv 6570 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7887 df-1st 8012 df-2nd 8013 df-frecs 8304 df-wrecs 8335 df-recs 8409 df-rdg 8448 df-er 8743 df-en 8984 df-dom 8985 df-sdom 8986 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11491 df-neg 11492 df-nn 12264 df-2 12326 df-sets 17197 df-slot 17215 df-ndx 17227 df-base 17245 df-plusg 17310 df-0g 17487 df-mgm 18665 df-sgrp 18744 df-mnd 18760 df-grp 18966 df-minusg 18967 df-sbg 18968 df-mgp 20152 df-ur 20199 df-ring 20252 df-lmod 20876 df-lss 20947 |
This theorem is referenced by: ocvin 21709 lshpdisj 38968 lcvexchlem2 39016 lcvexchlem4 39018 lcvexchlem5 39019 lcvp 39021 lsatcvat3 39033 dihmeetlem13N 41301 dochnoncon 41373 dochexmidlem5 41446 lclkrlem2f 41494 lcfrlem25 41549 mapdincl 41643 mapdin 41644 lmhmlnmsplit 43075 |
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