Theorem ellspsn3 21091

Description: A member of the span of the singleton of a vector is a member of a subspace containing the vector. (elspansn3 31890 analog.) (Contributed by NM, 4-Jul-2014.)

Hypotheses

Ref	Expression
lspsnss.s	⊢ 𝑆 = (LSubSp‘𝑊)
lspsnss.n	⊢ 𝑁 = (LSpan‘𝑊)
ellspsn3.w	⊢ (𝜑 → 𝑊 ∈ LMod)
ellspsn3.u	⊢ (𝜑 → 𝑈 ∈ 𝑆)
ellspsn3.x	⊢ (𝜑 → 𝑋 ∈ 𝑈)
ellspsn3.y	⊢ (𝜑 → 𝑌 ∈ (𝑁‘{𝑋}))

Assertion

Ref	Expression
ellspsn3	⊢ (𝜑 → 𝑌 ∈ 𝑈)

Proof of Theorem ellspsn3

Step	Hyp	Ref	Expression
1		ellspsn3.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
2		ellspsn3.u	. . 3 ⊢ (𝜑 → 𝑈 ∈ 𝑆)
3		ellspsn3.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝑈)
4		lspsnss.s	. . . 4 ⊢ 𝑆 = (LSubSp‘𝑊)
5		lspsnss.n	. . . 4 ⊢ 𝑁 = (LSpan‘𝑊)
6	4, 5	lspsnss 21090	. . 3 ⊢ ((𝑊 ∈ LMod ∧ 𝑈 ∈ 𝑆 ∧ 𝑋 ∈ 𝑈) → (𝑁‘{𝑋}) ⊆ 𝑈)
7	1, 2, 3, 6	syl3anc 1396	. 2 ⊢ (𝜑 → (𝑁‘{𝑋}) ⊆ 𝑈)
8		ellspsn3.y	. 2 ⊢ (𝜑 → 𝑌 ∈ (𝑁‘{𝑋}))
9	7, 8	sseldd 3937	1 ⊢ (𝜑 → 𝑌 ∈ 𝑈)

Syntax hints:   → wi 4   = wceq 1568   ∈ wcel 2141   ⊆ wss 3904  {csn 4588  ‘cfv 6536  LModclmod 20960  LSubSpclss 21031  LSpanclspn 21071

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5237  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rmo 3367  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-op 4595  df-uni 4872  df-int 4912  df-iun 4957  df-br 5109  df-opab 5173  df-mpt 5192  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-riota 7367  df-ov 7413  df-0g 17493  df-mgm 18697  df-sgrp 18776  df-mnd 18792  df-grp 19002  df-lmod 20962  df-lss 21032  df-lsp 21072

This theorem is referenced by:  ellspsn4  21227