Theorem lssuni 20986

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 3446	. . . 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 20983	. . . 4 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ⊆ 𝑉)
5	1, 4	mprgbir 3082	. . 3 ⊢ 𝑆 = {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
6	5	unieqi 4876	. 2 ⊢ ∪ 𝑆 = ∪ {𝑥 ∈ 𝑆 ∣ 𝑥 ⊆ 𝑉}
7		lssuni.w	. . 3 ⊢ (𝜑 → 𝑊 ∈ LMod)
8	2, 3	lss1 20985	. . 3 ⊢ (𝑊 ∈ LMod → 𝑉 ∈ 𝑆)
9		unimax 4902	. . 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 2808	1 ⊢ (𝜑 → ∪ 𝑆 = 𝑉)

Syntax hints:   → wi 4   = wceq 1559   ∈ wcel 2141  {crab 3413   ⊆ wss 3904  ∪ cuni 4864  ‘cfv 6517  Basecbs 17228  LModclmod 20907  LSubSpclss 20978

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5245  ax-nul 5255  ax-pow 5321  ax-pr 5389

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-rmo 3366  df-reu 3367  df-rab 3414  df-v 3455  df-sbc 3745  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5540  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-iota 6473  df-fun 6519  df-fv 6525  df-riota 7349  df-ov 7395  df-0g 17453  df-mgm 18657  df-sgrp 18736  df-mnd 18752  df-grp 18961  df-lmod 20909  df-lss 20979

This theorem is referenced by:  mapdunirnN  42238