Theorem lsmssv 18058

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 2622	. . 3 ⊢ (+g‘𝐺) = (+g‘𝐺)
3		lsmless2.s	. . 3 ⊢ ⊕ = (LSSum‘𝐺)
4	1, 2, 3	lsmvalx 18054	. 2 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑇 ⊕ 𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)))
5		simpl1 1064	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝐺 ∈ Mnd)
6		simp2 1062	. . . . . . . 8 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → 𝑇 ⊆ 𝐵)
7	6	sselda 3603	. . . . . . 7 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑥 ∈ 𝑇) → 𝑥 ∈ 𝐵)
8	7	adantrr 753	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝑥 ∈ 𝐵)
9		simp3 1063	. . . . . . . 8 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → 𝑈 ⊆ 𝐵)
10	9	sselda 3603	. . . . . . 7 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝐵)
11	10	adantrl 752	. . . . . 6 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → 𝑦 ∈ 𝐵)
12	1, 2	mndcl 17301	. . . . . 6 ⊢ ((𝐺 ∈ Mnd ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
13	5, 8, 11, 12	syl3anc 1326	. . . . 5 ⊢ (((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ (𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
14	13	ralrimivva 2971	. . . 4 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → ∀𝑥 ∈ 𝑇 ∀𝑦 ∈ 𝑈 (𝑥(+g‘𝐺)𝑦) ∈ 𝐵)
15		eqid 2622	. . . . 5 ⊢ (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) = (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦))
16	15	fmpt2 7237	. . . 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 208	. . 3 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)):(𝑇 × 𝑈)⟶𝐵)
18		frn 6053	. . 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 3639	1 ⊢ ((𝐺 ∈ Mnd ∧ 𝑇 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑇 ⊕ 𝑈) ⊆ 𝐵)

Syntax hints:   → wi 4   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∀wral 2912   ⊆ wss 3574   × cxp 5112  ran crn 5115  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ↦ cmpt2 6652  Basecbs 15857  +_gcplusg 15941  Mndcmnd 17294  LSSumclsm 18049

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-lsm 18051

This theorem is referenced by:  lsmsubm  18068  lsmass  18083  lsmcntzr  18093