Theorem lsmless2x 18500

Description: Subset implies subgroup sum subset (extended domain version). (Contributed by NM, 25-Feb-2014.) (Revised by Mario Carneiro, 19-Apr-2016.)

Hypotheses

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

Assertion

Ref	Expression
lsmless2x	⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (𝑅 ⊕ 𝑇) ⊆ (𝑅 ⊕ 𝑈))

Proof of Theorem lsmless2x

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

Step	Hyp	Ref	Expression
1		ssrexv 3955	. . . . 5 ⊢ (𝑇 ⊆ 𝑈 → (∃𝑧 ∈ 𝑇 𝑥 = (𝑦(+g‘𝐺)𝑧) → ∃𝑧 ∈ 𝑈 𝑥 = (𝑦(+g‘𝐺)𝑧)))
2	1	reximdv 3236	. . . 4 ⊢ (𝑇 ⊆ 𝑈 → (∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑇 𝑥 = (𝑦(+g‘𝐺)𝑧) → ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑈 𝑥 = (𝑦(+g‘𝐺)𝑧)))
3	2	adantl 482	. . 3 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑇 𝑥 = (𝑦(+g‘𝐺)𝑧) → ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑈 𝑥 = (𝑦(+g‘𝐺)𝑧)))
4		simpl1 1184	. . . 4 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → 𝐺 ∈ 𝑉)
5		simpl2 1185	. . . 4 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → 𝑅 ⊆ 𝐵)
6		simpr 485	. . . . 5 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → 𝑇 ⊆ 𝑈)
7		simpl3 1186	. . . . 5 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → 𝑈 ⊆ 𝐵)
8	6, 7	sstrd 3899	. . . 4 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → 𝑇 ⊆ 𝐵)
9		lsmless2.v	. . . . 5 ⊢ 𝐵 = (Base‘𝐺)
10		eqid 2795	. . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺)
11		lsmless2.s	. . . . 5 ⊢ ⊕ = (LSSum‘𝐺)
12	9, 10, 11	lsmelvalx 18495	. . . 4 ⊢ ((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑇 ⊆ 𝐵) → (𝑥 ∈ (𝑅 ⊕ 𝑇) ↔ ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑇 𝑥 = (𝑦(+g‘𝐺)𝑧)))
13	4, 5, 8, 12	syl3anc 1364	. . 3 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (𝑥 ∈ (𝑅 ⊕ 𝑇) ↔ ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑇 𝑥 = (𝑦(+g‘𝐺)𝑧)))
14	9, 10, 11	lsmelvalx 18495	. . . 4 ⊢ ((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) → (𝑥 ∈ (𝑅 ⊕ 𝑈) ↔ ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑈 𝑥 = (𝑦(+g‘𝐺)𝑧)))
15	14	adantr 481	. . 3 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (𝑥 ∈ (𝑅 ⊕ 𝑈) ↔ ∃𝑦 ∈ 𝑅 ∃𝑧 ∈ 𝑈 𝑥 = (𝑦(+g‘𝐺)𝑧)))
16	3, 13, 15	3imtr4d 295	. 2 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (𝑥 ∈ (𝑅 ⊕ 𝑇) → 𝑥 ∈ (𝑅 ⊕ 𝑈)))
17	16	ssrdv 3895	1 ⊢ (((𝐺 ∈ 𝑉 ∧ 𝑅 ⊆ 𝐵 ∧ 𝑈 ⊆ 𝐵) ∧ 𝑇 ⊆ 𝑈) → (𝑅 ⊕ 𝑇) ⊆ (𝑅 ⊕ 𝑈))

Syntax hints:   → wi 4   ↔ wb 207   ∧ wa 396   ∧ w3a 1080   = wceq 1522   ∈ wcel 2081  ∃wrex 3106   ⊆ wss 3859  ‘cfv 6225  (class class class)co 7016  Basecbs 16312  +_gcplusg 16394  LSSumclsm 18489

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1777  ax-4 1791  ax-5 1888  ax-6 1947  ax-7 1992  ax-8 2083  ax-9 2091  ax-10 2112  ax-11 2126  ax-12 2141  ax-13 2344  ax-ext 2769  ax-rep 5081  ax-sep 5094  ax-nul 5101  ax-pow 5157  ax-pr 5221  ax-un 7319

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 843  df-3an 1082  df-tru 1525  df-ex 1762  df-nf 1766  df-sb 2043  df-mo 2576  df-eu 2612  df-clab 2776  df-cleq 2788  df-clel 2863  df-nfc 2935  df-ne 2985  df-ral 3110  df-rex 3111  df-reu 3112  df-rab 3114  df-v 3439  df-sbc 3707  df-csb 3812  df-dif 3862  df-un 3864  df-in 3866  df-ss 3874  df-nul 4212  df-if 4382  df-pw 4455  df-sn 4473  df-pr 4475  df-op 4479  df-uni 4746  df-iun 4827  df-br 4963  df-opab 5025  df-mpt 5042  df-id 5348  df-xp 5449  df-rel 5450  df-cnv 5451  df-co 5452  df-dm 5453  df-rn 5454  df-res 5455  df-ima 5456  df-iota 6189  df-fun 6227  df-fn 6228  df-f 6229  df-f1 6230  df-fo 6231  df-f1o 6232  df-fv 6233  df-ov 7019  df-oprab 7020  df-mpo 7021  df-1st 7545  df-2nd 7546  df-lsm 18491

This theorem is referenced by:  lsmless2  18515  lsmssspx  19550