Theorem lsmssv 17881

Description: Subgroup sum is a subset of the base. (Contributed by Mario Carneiro, 19-Apr-2016.)

Hypotheses

Ref	Expression
lsmless2.v	⊢ 𝐵 = (Base‘𝐺)
lsmless2.s	⊢ ⊕ = (LSSum‘𝐺)

Assertion

Ref	Expression
lsmssv	⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑇 ⊕ 𝑈) ⊆ 𝐵)

Proof of Theorem lsmssv

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		lsmless2.v	. . 3 ⊢ 𝐵 = (Base‘𝐺)
2		eqid 2610	. . 3 ⊢ (+g‘𝐺) = (+g‘𝐺)
3		lsmless2.s	. . 3 ⊢ ⊕ = (LSSum‘𝐺)
4	1, 2, 3	lsmvalx 17877	. 2 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑇 ⊕ 𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)))
5		simpl1 1057	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝐺 ∈ Mnd)
6		simp2 1055	. . . . . . . 8 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → 𝑇 ⊆ 𝐵)
7	6	sselda 3568	. . . . . . 7 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑥 ∈ 𝑇) → 𝑥 ∈ 𝐵)
8	7	adantrr 749	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝑥 ∈ 𝐵)
9		simp3 1056	. . . . . . . 8 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → 𝑈 ⊆ 𝐵)
10	9	sselda 3568	. . . . . . 7 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝐵)
11	10	adantrl 748	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝑦 ∈ 𝐵)
12	1, 2	mndcl 17124	. . . . . 6 ⊢ ((𝐺 ∈ Mnd ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
13	5, 8, 11, 12	syl3anc 1318	. . . . 5 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
14	13	ralrimivva 2954	. . . 4 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → ∀𝑥 ∈ 𝑇 ∀𝑦 ∈ 𝑈 (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
15		eqid 2610	. . . . 5 ⊢ (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) = (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦))
16	15	fmpt2 7126	. . . 4 ⊢ (∀𝑥 ∈ 𝑇 ∀𝑦 ∈ 𝑈 (𝑥(+g‘𝐺)𝑦) ∈ 𝐵 ↔ (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)):(𝑇 × 𝑈)⟶𝐵)
17	14, 16	sylib 207	. . 3 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)):(𝑇 × 𝑈)⟶𝐵)
18		frn 5966	. . 3 ⊢ ((𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)):(𝑇 × 𝑈)⟶𝐵 → ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) ⊆ 𝐵)
19	17, 18	syl 17	. 2 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) ⊆ 𝐵)
20	4, 19	eqsstrd 3602	1 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑇 ⊕ 𝑈) ⊆ 𝐵)

Syntax hints:   → wi 4   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896   ⊆ wss 3540   × cxp 5036  ran crn 5039  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551  Basecbs 15695  +_gcplusg 15768  Mndcmnd 17117  LSSumclsm 17872

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-1st 7059  df-2nd 7060  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-lsm 17874

This theorem is referenced by:  lsmsubm  17891  lsmass  17906  lsmcntzr  17916