Theorem lssuni 19162

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 3257	. . . 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 19159	. . . 4 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ⊆ 𝑉)
5	1, 4	mprgbir 3065	. . 3 ⊢ 𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
6	5	unieqi 4597	. 2 ⊢ ∪ 𝑆 = ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
7		lssuni.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
8	2, 3	lss1 19161	. . 3 ⊢ (𝑊 ∈ LMod → 𝑉 ∈ 𝑆)
9		unimax 4625	. . 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 2806	1 ⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Syntax hints:   → wi 4   = wceq 1632   ∈ wcel 2139  {crab 3054   ⊆ wss 3715  ∪ cuni 4588  ‘cfv 6049  Basecbs 16079  LModclmod 19085  LSubSpclss 19154

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-reu 3057  df-rmo 3058  df-rab 3059  df-v 3342  df-sbc 3577  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-iota 6012  df-fun 6051  df-fv 6057  df-riota 6775  df-ov 6817  df-0g 16324  df-mgm 17463  df-sgrp 17505  df-mnd 17516  df-grp 17646  df-lmod 19087  df-lss 19155

This theorem is referenced by:  mapdunirnN  37459