Theorem lssuni 19332

Description: The union of all subspaces is the vector space. (Contributed by NM, 13-Mar-2015.)

Hypotheses

Ref	Expression
lssss.v	⊢ 𝑉 = (Base‘𝑊)
lssss.s	⊢ 𝑆 = (LSubSp‘𝑊)
lssuni.w	⊢ (𝜑 → 𝑊 ∈ LMod)

Assertion

Ref	Expression
lssuni	⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Proof of Theorem lssuni

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		rabid2 3304	. . . 4 ⊢ (𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉} ↔ ∀𝑥 ∈ 𝑆 𝑥 ⊆ 𝑉)
2		lssss.v	. . . . 5 ⊢ 𝑉 = (Base‘𝑊)
3		lssss.s	. . . . 5 ⊢ 𝑆 = (LSubSp‘𝑊)
4	2, 3	lssss 19329	. . . 4 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ⊆ 𝑉)
5	1, 4	mprgbir 3108	. . 3 ⊢ 𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
6	5	unieqi 4680	. 2 ⊢ ∪ 𝑆 = ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
7		lssuni.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
8	2, 3	lss1 19331	. . 3 ⊢ (𝑊 ∈ LMod → 𝑉 ∈ 𝑆)
9		unimax 4708	. . 3 ⊢ (𝑉 ∈ 𝑆 → ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉} = 𝑉)
10	7, 8, 9	3syl 18	. 2 ⊢ (𝜑 → ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉} = 𝑉)
11	6, 10	syl5eq 2825	1 ⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Syntax hints:   → wi 4   = wceq 1601   ∈ wcel 2106  {crab 3093   ⊆ wss 3791  ∪ cuni 4671  ‘cfv 6135  Basecbs 16255  LModclmod 19255  LSubSpclss 19324

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2054  ax-8 2108  ax-9 2115  ax-10 2134  ax-11 2149  ax-12 2162  ax-13 2333  ax-ext 2753  ax-sep 5017  ax-nul 5025  ax-pow 5077  ax-pr 5138

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2550  df-eu 2586  df-clab 2763  df-cleq 2769  df-clel 2773  df-nfc 2920  df-ne 2969  df-ral 3094  df-rex 3095  df-reu 3096  df-rmo 3097  df-rab 3098  df-v 3399  df-sbc 3652  df-dif 3794  df-un 3796  df-in 3798  df-ss 3805  df-nul 4141  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-op 4404  df-uni 4672  df-br 4887  df-opab 4949  df-mpt 4966  df-id 5261  df-xp 5361  df-rel 5362  df-cnv 5363  df-co 5364  df-dm 5365  df-iota 6099  df-fun 6137  df-fv 6143  df-riota 6883  df-ov 6925  df-0g 16488  df-mgm 17628  df-sgrp 17670  df-mnd 17681  df-grp 17812  df-lmod 19257  df-lss 19325

This theorem is referenced by:  mapdunirnN  37788