Theorem lssuni 19694

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 3381	. . . 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 19691	. . . 4 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ⊆ 𝑉)
5	1, 4	mprgbir 3153	. . 3 ⊢ 𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
6	5	unieqi 4837	. 2 ⊢ ∪ 𝑆 = ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
7		lssuni.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
8	2, 3	lss1 19693	. . 3 ⊢ (𝑊 ∈ LMod → 𝑉 ∈ 𝑆)
9		unimax 4860	. . 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 2868	1 ⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Syntax hints:   → wi 4   = wceq 1537   ∈ wcel 2114  {crab 3142   ⊆ wss 3924  ∪ cuni 4824  ‘cfv 6341  Basecbs 16466  LModclmod 19617  LSubSpclss 19686

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5189  ax-nul 5196  ax-pow 5252  ax-pr 5316

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3488  df-sbc 3764  df-dif 3927  df-un 3929  df-in 3931  df-ss 3940  df-nul 4280  df-if 4454  df-pw 4527  df-sn 4554  df-pr 4556  df-op 4560  df-uni 4825  df-br 5053  df-opab 5115  df-mpt 5133  df-id 5446  df-xp 5547  df-rel 5548  df-cnv 5549  df-co 5550  df-dm 5551  df-iota 6300  df-fun 6343  df-fv 6349  df-riota 7100  df-ov 7145  df-0g 16698  df-mgm 17835  df-sgrp 17884  df-mnd 17895  df-grp 18089  df-lmod 19619  df-lss 19687

This theorem is referenced by:  mapdunirnN  38818