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Theorem lspid 21290
Description: The span of a subspace is itself. (spanid 31982 analog.) (Contributed by NM, 15-Dec-2013.) (Revised by Mario Carneiro, 19-Jun-2014.)
Hypotheses
Ref Expression
lspid.s 𝑆 = (LSubSp‘𝑊)
lspid.n 𝑁 = (LSpan‘𝑊)
Assertion
Ref Expression
lspid ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑁‘𝑈) = 𝑈)

Proof of Theorem lspid
Dummy variable 𝑡 is distinct from all other variables.
StepHypRef Expression
1 eqid 2763 . . . 4 (Base‘𝑊) = (Base‘𝑊)
2 lspid.s . . . 4 𝑆 = (LSubSp‘𝑊)
31, 2lssss 21244 . . 3 (𝑈 ∈ 𝑆 → 𝑈 ⊆ (Base‘𝑊))
4 lspid.n . . . 4 𝑁 = (LSpan‘𝑊)
51, 2, 4lspval 21283 . . 3 ((𝑊 ∈ LMod ∧ 𝑈 ⊆ (Base‘𝑊)) → (𝑁‘𝑈) = ∩ {𝑡 ∈ 𝑆 ∣ 𝑈 ⊆ 𝑡})
63, 5sylan2 605 . 2 ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑁‘𝑈) = ∩ {𝑡 ∈ 𝑆 ∣ 𝑈 ⊆ 𝑡})
7 intmin 4931 . . 3 (𝑈 ∈ 𝑆 → ∩ {𝑡 ∈ 𝑆 ∣ 𝑈 ⊆ 𝑡} = 𝑈)
87adantl 487 . 2 ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → ∩ {𝑡 ∈ 𝑆 ∣ 𝑈 ⊆ 𝑡} = 𝑈)
96, 8eqtrd 2798 1 ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆) → (𝑁‘𝑈) = 𝑈)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2147  {crab 3416   ⊆ wss 3900  ∩ cint 4910  ‘cfv 6561  Basecbs 17419  LModclmod 21168  LSubSpclss 21239  LSpanclspn 21279
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-rep 5236  ax-sep 5253  ax-nul 5264  ax-pow 5332  ax-pr 5396
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-int 4911  df-iun 4956  df-br 5107  df-opab 5172  df-mpt 5191  df-id 5551  df-xp 5662  df-rel 5663  df-cnv 5664  df-co 5665  df-dm 5666  df-rn 5667  df-res 5668  df-ima 5669  df-iota 6515  df-fun 6563  df-fn 6564  df-f 6565  df-f1 6566  df-fo 6567  df-f1o 6568  df-fv 6569  df-riota 7403  df-ov 7449  df-0g 17644  df-mgm 18848  df-sgrp 18940  df-mnd 18956  df-grp 19179  df-lmod 21170  df-lss 21240  df-lsp 21280
This theorem is used by:  lspidm  21294  lspssp  21296  lspsn0  21316  lspsolvlem  21453  lbsextlem3  21471  islshpsm  40240  lshpnel2N  40245  lssats  40272  lkrlsp3  40364  dochspocN  42640  dochsatshp  42711  filnm  44296
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