Theorem subglsm 18437

Description: The subgroup sum evaluated within a subgroup. (Contributed by Mario Carneiro, 27-Apr-2016.)

Hypotheses

Ref	Expression
subglsm.h	⊢ 𝐻 = (𝐺 ↾s 𝑆)
subglsm.s	⊢ ⊕ = (LSSum‘𝐺)
subglsm.a	⊢ 𝐴 = (LSSum‘𝐻)

Assertion

Ref	Expression
subglsm	⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → (𝑇 ⊕ 𝑈) = (𝑇𝐴𝑈))

Proof of Theorem subglsm

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

Step	Hyp	Ref	Expression
1		simp11 1266	. . . . . 6 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) ∧ 𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈) → 𝑆 ∈ (SubGrp‘𝐺))
2		subglsm.h	. . . . . . 7 ⊢ 𝐻 = (𝐺 ↾s 𝑆)
3		eqid 2825	. . . . . . 7 ⊢ (+g‘𝐺) = (+g‘𝐺)
4	2, 3	ressplusg 16352	. . . . . 6 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (+g‘𝐺) = (+g‘𝐻))
5	1, 4	syl 17	. . . . 5 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) ∧ 𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈) → (+g‘𝐺) = (+g‘𝐻))
6	5	oveqd 6922	. . . 4 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) ∧ 𝑥 ∈ 𝑇 ∧ 𝑦 ∈ 𝑈) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
7	6	mpt2eq3dva 6979	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) = (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐻)𝑦)))
8	7	rneqd 5585	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐻)𝑦)))
9		subgrcl 17950	. . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝐺 ∈ Grp)
10	9	3ad2ant1 1169	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝐺 ∈ Grp)
11		simp2 1173	. . . 4 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑇 ⊆ 𝑆)
12		eqid 2825	. . . . . 6 ⊢ (Base‘𝐺) = (Base‘𝐺)
13	12	subgss 17946	. . . . 5 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝑆 ⊆ (Base‘𝐺))
14	13	3ad2ant1 1169	. . . 4 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑆 ⊆ (Base‘𝐺))
15	11, 14	sstrd 3837	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑇 ⊆ (Base‘𝐺))
16		simp3 1174	. . . 4 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑈 ⊆ 𝑆)
17	16, 14	sstrd 3837	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑈 ⊆ (Base‘𝐺))
18		subglsm.s	. . . 4 ⊢ ⊕ = (LSSum‘𝐺)
19	12, 3, 18	lsmvalx 18405	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑇 ⊆ (Base‘𝐺) ∧ 𝑈 ⊆ (Base‘𝐺)) → (𝑇 ⊕ 𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)))
20	10, 15, 17, 19	syl3anc 1496	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → (𝑇 ⊕ 𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐺)𝑦)))
21	2	subggrp 17948	. . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝐻 ∈ Grp)
22	21	3ad2ant1 1169	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝐻 ∈ Grp)
23	2	subgbas 17949	. . . . 5 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → 𝑆 = (Base‘𝐻))
24	23	3ad2ant1 1169	. . . 4 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑆 = (Base‘𝐻))
25	11, 24	sseqtrd 3866	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑇 ⊆ (Base‘𝐻))
26	16, 24	sseqtrd 3866	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → 𝑈 ⊆ (Base‘𝐻))
27		eqid 2825	. . . 4 ⊢ (Base‘𝐻) = (Base‘𝐻)
28		eqid 2825	. . . 4 ⊢ (+g‘𝐻) = (+g‘𝐻)
29		subglsm.a	. . . 4 ⊢ 𝐴 = (LSSum‘𝐻)
30	27, 28, 29	lsmvalx 18405	. . 3 ⊢ ((𝐻 ∈ Grp ∧ 𝑇 ⊆ (Base‘𝐻) ∧ 𝑈 ⊆ (Base‘𝐻)) → (𝑇𝐴𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐻)𝑦)))
31	22, 25, 26, 30	syl3anc 1496	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → (𝑇𝐴𝑈) = ran (𝑥 ∈ 𝑇, 𝑦 ∈ 𝑈 ↦ (𝑥(+g‘𝐻)𝑦)))
32	8, 20, 31	3eqtr4d 2871	1 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑇 ⊆ 𝑆 ∧ 𝑈 ⊆ 𝑆) → (𝑇 ⊕ 𝑈) = (𝑇𝐴𝑈))

Syntax hints:   → wi 4   ∧ w3a 1113   = wceq 1658   ∈ wcel 2166   ⊆ wss 3798  ran crn 5343  ‘cfv 6123  (class class class)co 6905   ↦ cmpt2 6907  Basecbs 16222   ↾_s cress 16223  +_gcplusg 16305  Grpcgrp 17776  SubGrpcsubg 17939  LSSumclsm 18400

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1896  ax-4 1910  ax-5 2011  ax-6 2077  ax-7 2114  ax-8 2168  ax-9 2175  ax-10 2194  ax-11 2209  ax-12 2222  ax-13 2391  ax-ext 2803  ax-rep 4994  ax-sep 5005  ax-nul 5013  ax-pow 5065  ax-pr 5127  ax-un 7209  ax-cnex 10308  ax-resscn 10309  ax-1cn 10310  ax-icn 10311  ax-addcl 10312  ax-addrcl 10313  ax-mulcl 10314  ax-mulrcl 10315  ax-mulcom 10316  ax-addass 10317  ax-mulass 10318  ax-distr 10319  ax-i2m1 10320  ax-1ne0 10321  ax-1rid 10322  ax-rnegex 10323  ax-rrecex 10324  ax-cnre 10325  ax-pre-lttri 10326  ax-pre-lttrn 10327  ax-pre-ltadd 10328  ax-pre-mulgt0 10329

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 881  df-3or 1114  df-3an 1115  df-tru 1662  df-ex 1881  df-nf 1885  df-sb 2070  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-nel 3103  df-ral 3122  df-rex 3123  df-reu 3124  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-pss 3814  df-nul 4145  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-tp 4402  df-op 4404  df-uni 4659  df-iun 4742  df-br 4874  df-opab 4936  df-mpt 4953  df-tr 4976  df-id 5250  df-eprel 5255  df-po 5263  df-so 5264  df-fr 5301  df-we 5303  df-xp 5348  df-rel 5349  df-cnv 5350  df-co 5351  df-dm 5352  df-rn 5353  df-res 5354  df-ima 5355  df-pred 5920  df-ord 5966  df-on 5967  df-lim 5968  df-suc 5969  df-iota 6086  df-fun 6125  df-fn 6126  df-f 6127  df-f1 6128  df-fo 6129  df-f1o 6130  df-fv 6131  df-riota 6866  df-ov 6908  df-oprab 6909  df-mpt2 6910  df-om 7327  df-1st 7428  df-2nd 7429  df-wrecs 7672  df-recs 7734  df-rdg 7772  df-er 8009  df-en 8223  df-dom 8224  df-sdom 8225  df-pnf 10393  df-mnf 10394  df-xr 10395  df-ltxr 10396  df-le 10397  df-sub 10587  df-neg 10588  df-nn 11351  df-2 11414  df-ndx 16225  df-slot 16226  df-base 16228  df-sets 16229  df-ress 16230  df-plusg 16318  df-subg 17942  df-lsm 18402

This theorem is referenced by:  pgpfaclem1  18834