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Theorem frlmsslss2 20114

Description: A subset of a free module obtained by restricting the support set is a submodule. 𝐽 is the set of permitted unit vectors. (Contributed by Stefan O'Rear, 5-Feb-2015.) (Revised by AV, 23-Jun-2019.)

**Hypotheses**
Ref	Expression
frlmsslss.y	⊢ 𝑌 = (𝑅 freeLMod 𝐼)
frlmsslss.u	⊢ 𝑈 = (LSubSp‘𝑌)
frlmsslss.b	⊢ 𝐵 = (Base‘𝑌)
frlmsslss.z	⊢ 0 = (0_g‘𝑅)
frlmsslss2.c	⊢ 𝐶 = {𝑥 ∈ 𝐵 ∣ (𝑥 supp 0 ) ⊆ 𝐽}

**Assertion**
Ref	Expression
frlmsslss2	⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → 𝐶 ∈ 𝑈)

Distinct variable groups: 𝑥,𝐵 𝑥,𝐼 𝑥,𝐽 𝑥,𝑅 𝑥,𝑈 𝑥, 0 𝑥,𝑉 𝑥,𝑌 Allowed substitution hint: 𝐶(𝑥)

**Proof of Theorem frlmsslss2**
Step	Hyp	Ref	Expression
1		frlmsslss2.c	. . 3 ⊢ 𝐶 = {𝑥 ∈ 𝐵 ∣ (𝑥 supp 0 ) ⊆ 𝐽}
2		frlmsslss.y	. . . . . . . . 9 ⊢ 𝑌 = (𝑅 freeLMod 𝐼)
3		eqid 2622	. . . . . . . . 9 ⊢ (Base‘𝑅) = (Base‘𝑅)
4		frlmsslss.b	. . . . . . . . 9 ⊢ 𝐵 = (Base‘𝑌)
5	2, 3, 4	frlmbasf 20104	. . . . . . . 8 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵) → 𝑥:𝐼⟶(Base‘𝑅))
6	5	3ad2antl2 1224	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥:𝐼⟶(Base‘𝑅))
7		ffn 6045	. . . . . . 7 ⊢ (𝑥:𝐼⟶(Base‘𝑅) → 𝑥 Fn 𝐼)
8	6, 7	syl 17	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 Fn 𝐼)
9		simpl3 1066	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝐽 ⊆ 𝐼)
10		undif 4049	. . . . . . . 8 ⊢ (𝐽 ⊆ 𝐼 ↔ (𝐽 ∪ (𝐼 ∖ 𝐽)) = 𝐼)
11	9, 10	sylib 208	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝐽 ∪ (𝐼 ∖ 𝐽)) = 𝐼)
12	11	fneq2d 5982	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)) ↔ 𝑥 Fn 𝐼))
13	8, 12	mpbird 247	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)))
14		simpr 477	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵)
15		frlmsslss.z	. . . . . . 7 ⊢ 0 = (0_g‘𝑅)
16		fvex 6201	. . . . . . 7 ⊢ (0_g‘𝑅) ∈ V
17	15, 16	eqeltri 2697	. . . . . 6 ⊢ 0 ∈ V
18	17	a1i 11	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 0 ∈ V)
19		disjdif 4040	. . . . . 6 ⊢ (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅
20	19	a1i 11	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅)
21		fnsuppres 7322	. . . . 5 ⊢ ((𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)) ∧ (𝑥 ∈ 𝐵 ∧ 0 ∈ V) ∧ (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅) → ((𝑥 supp 0 ) ⊆ 𝐽 ↔ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })))
22	13, 14, 18, 20, 21	syl121anc 1331	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → ((𝑥 supp 0 ) ⊆ 𝐽 ↔ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })))
23	22	rabbidva 3188	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 supp 0 ) ⊆ 𝐽} = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })})
24	1, 23	syl5eq 2668	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → 𝐶 = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })})
25		difssd 3738	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → (𝐼 ∖ 𝐽) ⊆ 𝐼)
26		frlmsslss.u	. . . 4 ⊢ 𝑈 = (LSubSp‘𝑌)
27		eqid 2622	. . . 4 ⊢ {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })}
28	2, 26, 4, 15, 27	frlmsslss 20113	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ (𝐼 ∖ 𝐽) ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} ∈ 𝑈)
29	25, 28	syld3an3 1371	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} ∈ 𝑈)
30	24, 29	eqeltrd 2701	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → 𝐶 ∈ 𝑈)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 {crab 2916 Vcvv 3200 ∖ cdif 3571 ∪ cun 3572 ∩ cin 3573 ⊆ wss 3574 ∅c0 3915 {csn 4177 × cxp 5112 ↾ cres 5116 Fn wfn 5883 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 supp csupp 7295 Basecbs 15857 0_gc0g 16100 Ringcrg 18547 LSubSpclss 18932 freeLMod cfrlm 20090

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 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 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-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 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-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 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-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 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-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-om 7066 df-1st 7168 df-2nd 7169 df-supp 7296 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-oadd 7564 df-er 7742 df-map 7859 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fsupp 8276 df-sup 8348 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-nn 11021 df-2 11079 df-3 11080 df-4 11081 df-5 11082 df-6 11083 df-7 11084 df-8 11085 df-9 11086 df-n0 11293 df-z 11378 df-dec 11494 df-uz 11688 df-fz 12327 df-struct 15859 df-ndx 15860 df-slot 15861 df-base 15863 df-sets 15864 df-ress 15865 df-plusg 15954 df-mulr 15955 df-sca 15957 df-vsca 15958 df-ip 15959 df-tset 15960 df-ple 15961 df-ds 15964 df-hom 15966 df-cco 15967 df-0g 16102 df-prds 16108 df-pws 16110 df-mgm 17242 df-sgrp 17284 df-mnd 17295 df-mhm 17335 df-submnd 17336 df-grp 17425 df-minusg 17426 df-sbg 17427 df-subg 17591 df-ghm 17658 df-mgp 18490 df-ur 18502 df-ring 18549 df-subrg 18778 df-lmod 18865 df-lss 18933 df-lmhm 19022 df-sra 19172 df-rgmod 19173 df-dsmm 20076 df-frlm 20091

This theorem is referenced by: frlmssuvc1 20133 frlmsslsp 20135

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