Theorem lssuni 20201

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 3314	. . . 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 20198	. . . 4 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ⊆ 𝑉)
5	1, 4	mprgbir 3079	. . 3 ⊢ 𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
6	5	unieqi 4852	. 2 ⊢ ∪ 𝑆 = ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
7		lssuni.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
8	2, 3	lss1 20200	. . 3 ⊢ (𝑊 ∈ LMod → 𝑉 ∈ 𝑆)
9		unimax 4877	. . 3 ⊢ (𝑉 ∈ 𝑆 → ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉} = 𝑉)
10	7, 8, 9	3syl 18	. 2 ⊢ (𝜑 → ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉} = 𝑉)
11	6, 10	eqtrid 2790	1 ⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Syntax hints:   → wi 4   = wceq 1539   ∈ wcel 2106  {crab 3068   ⊆ wss 3887  ∪ cuni 4839  ‘cfv 6433  Basecbs 16912  LModclmod 20123  LSubSpclss 20193

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-br 5075  df-opab 5137  df-mpt 5158  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-iota 6391  df-fun 6435  df-fv 6441  df-riota 7232  df-ov 7278  df-0g 17152  df-mgm 18326  df-sgrp 18375  df-mnd 18386  df-grp 18580  df-lmod 20125  df-lss 20194

This theorem is referenced by:  mapdunirnN  39664