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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 4919 | . . 3 ⊢ ((𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} = (𝑇 ∩ 𝑈)) | |
2 | 1 | 3adant1 1130 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} = (𝑇 ∩ 𝑈)) |
3 | simp1 1136 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → 𝑊 ∈ LMod) | |
4 | prssi 4760 | . . . 4 ⊢ ((𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ⊆ 𝑆) | |
5 | 4 | 3adant1 1130 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ⊆ 𝑆) |
6 | prnzg 4718 | . . . 4 ⊢ (𝑇 ∈ 𝑆 → {𝑇, 𝑈} ≠ ∅) | |
7 | 6 | 3ad2ant2 1134 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → {𝑇, 𝑈} ≠ ∅) |
8 | lssintcl.s | . . . 4 ⊢ 𝑆 = (LSubSp‘𝑊) | |
9 | 8 | lssintcl 20275 | . . 3 ⊢ ((𝑊 ∈ LMod ∧ {𝑇, 𝑈} ⊆ 𝑆 ∧ {𝑇, 𝑈} ≠ ∅) → ∩ {𝑇, 𝑈} ∈ 𝑆) |
10 | 3, 5, 7, 9 | syl3anc 1371 | . 2 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → ∩ {𝑇, 𝑈} ∈ 𝑆) |
11 | 2, 10 | eqeltrrd 2838 | 1 ⊢ ((𝑊 ∈ LMod ∧ 𝑇 ∈ 𝑆 ∧ 𝑈 ∈ 𝑆) → (𝑇 ∩ 𝑈) ∈ 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1087 = wceq 1539 ∈ wcel 2104 ≠ wne 2941 ∩ cin 3891 ⊆ wss 3892 ∅c0 4262 {cpr 4567 ∩ cint 4886 ‘cfv 6458 LModclmod 20172 LSubSpclss 20242 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10977 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 ax-pre-mulgt0 10998 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3304 df-reu 3305 df-rab 3306 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-1st 7863 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-sub 11257 df-neg 11258 df-nn 12024 df-2 12086 df-sets 16914 df-slot 16932 df-ndx 16944 df-base 16962 df-plusg 17024 df-0g 17201 df-mgm 18375 df-sgrp 18424 df-mnd 18435 df-grp 18629 df-minusg 18630 df-sbg 18631 df-mgp 19770 df-ur 19787 df-ring 19834 df-lmod 20174 df-lss 20243 |
This theorem is referenced by: ocvin 20928 lshpdisj 37201 lcvexchlem2 37249 lcvexchlem4 37251 lcvexchlem5 37252 lcvp 37254 lsatcvat3 37266 dihmeetlem13N 39533 dochnoncon 39605 dochexmidlem5 39678 lclkrlem2f 39726 lcfrlem25 39781 mapdincl 39875 mapdin 39876 lmhmlnmsplit 41108 |
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