frlmsslss2 - Metamath Proof Explorer

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Theorem frlmsslss2 20922

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 2824	. . . . . . . . 9 ⊢ (Base‘𝑅) = (Base‘𝑅)
4		frlmsslss.b	. . . . . . . . 9 ⊢ 𝐵 = (Base‘𝑌)
5	2, 3, 4	frlmbasf 20907	. . . . . . . 8 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵) → 𝑥:𝐼⟶(Base‘𝑅))
6	5	3ad2antl2 1182	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥:𝐼⟶(Base‘𝑅))
7	6	ffnd 6518	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 Fn 𝐼)
8		simpl3 1189	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝐽 ⊆ 𝐼)
9		undif 4433	. . . . . . . 8 ⊢ (𝐽 ⊆ 𝐼 ↔ (𝐽 ∪ (𝐼 ∖ 𝐽)) = 𝐼)
10	8, 9	sylib 220	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝐽 ∪ (𝐼 ∖ 𝐽)) = 𝐼)
11	10	fneq2d 6450	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)) ↔ 𝑥 Fn 𝐼))
12	7, 11	mpbird 259	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)))
13		simpr 487	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵)
14		frlmsslss.z	. . . . . . 7 ⊢ 0 = (0_g‘𝑅)
15	14	fvexi 6687	. . . . . 6 ⊢ 0 ∈ V
16	15	a1i 11	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → 0 ∈ V)
17		disjdif 4424	. . . . . 6 ⊢ (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅
18	17	a1i 11	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅)
19		fnsuppres 7860	. . . . 5 ⊢ ((𝑥 Fn (𝐽 ∪ (𝐼 ∖ 𝐽)) ∧ (𝑥 ∈ 𝐵 ∧ 0 ∈ V) ∧ (𝐽 ∩ (𝐼 ∖ 𝐽)) = ∅) → ((𝑥 supp 0 ) ⊆ 𝐽 ↔ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })))
20	12, 13, 16, 18, 19	syl121anc 1371	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) ∧ 𝑥 ∈ 𝐵) → ((𝑥 supp 0 ) ⊆ 𝐽 ↔ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })))
21	20	rabbidva 3481	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 supp 0 ) ⊆ 𝐽} = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })})
22	1, 21	syl5eq 2871	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → 𝐶 = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })})
23		difssd 4112	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → (𝐼 ∖ 𝐽) ⊆ 𝐼)
24		frlmsslss.u	. . . 4 ⊢ 𝑈 = (LSubSp‘𝑌)
25		eqid 2824	. . . 4 ⊢ {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} = {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })}
26	2, 24, 4, 14, 25	frlmsslss 20921	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ (𝐼 ∖ 𝐽) ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} ∈ 𝑈)
27	23, 26	syld3an3 1405	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → {𝑥 ∈ 𝐵 ∣ (𝑥 ↾ (𝐼 ∖ 𝐽)) = ((𝐼 ∖ 𝐽) × { 0 })} ∈ 𝑈)
28	22, 27	eqeltrd 2916	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐼 ∈ 𝑉 ∧ 𝐽 ⊆ 𝐼) → 𝐶 ∈ 𝑈)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1083 = wceq 1536 ∈ wcel 2113 {crab 3145 Vcvv 3497 ∖ cdif 3936 ∪ cun 3937 ∩ cin 3938 ⊆ wss 3939 ∅c0 4294 {csn 4570 × cxp 5556 ↾ cres 5560 Fn wfn 6353 ⟶wf 6354 ‘cfv 6358 (class class class)co 7159 supp csupp 7833 Basecbs 16486 0_gc0g 16716 Ringcrg 19300 LSubSpclss 19706 freeLMod cfrlm 20893

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-rep 5193 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 ax-cnex 10596 ax-resscn 10597 ax-1cn 10598 ax-icn 10599 ax-addcl 10600 ax-addrcl 10601 ax-mulcl 10602 ax-mulrcl 10603 ax-mulcom 10604 ax-addass 10605 ax-mulass 10606 ax-distr 10607 ax-i2m1 10608 ax-1ne0 10609 ax-1rid 10610 ax-rnegex 10611 ax-rrecex 10612 ax-cnre 10613 ax-pre-lttri 10614 ax-pre-lttrn 10615 ax-pre-ltadd 10616 ax-pre-mulgt0 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-nel 3127 df-ral 3146 df-rex 3147 df-reu 3148 df-rmo 3149 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-pss 3957 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-tp 4575 df-op 4577 df-uni 4842 df-int 4880 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-tr 5176 df-id 5463 df-eprel 5468 df-po 5477 df-so 5478 df-fr 5517 df-we 5519 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-pred 6151 df-ord 6197 df-on 6198 df-lim 6199 df-suc 6200 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7117 df-ov 7162 df-oprab 7163 df-mpo 7164 df-of 7412 df-om 7584 df-1st 7692 df-2nd 7693 df-supp 7834 df-wrecs 7950 df-recs 8011 df-rdg 8049 df-1o 8105 df-oadd 8109 df-er 8292 df-map 8411 df-ixp 8465 df-en 8513 df-dom 8514 df-sdom 8515 df-fin 8516 df-fsupp 8837 df-sup 8909 df-pnf 10680 df-mnf 10681 df-xr 10682 df-ltxr 10683 df-le 10684 df-sub 10875 df-neg 10876 df-nn 11642 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-z 11985 df-dec 12102 df-uz 12247 df-fz 12896 df-struct 16488 df-ndx 16489 df-slot 16490 df-base 16492 df-sets 16493 df-ress 16494 df-plusg 16581 df-mulr 16582 df-sca 16584 df-vsca 16585 df-ip 16586 df-tset 16587 df-ple 16588 df-ds 16590 df-hom 16592 df-cco 16593 df-0g 16718 df-prds 16724 df-pws 16726 df-mgm 17855 df-sgrp 17904 df-mnd 17915 df-mhm 17959 df-submnd 17960 df-grp 18109 df-minusg 18110 df-sbg 18111 df-subg 18279 df-ghm 18359 df-mgp 19243 df-ur 19255 df-ring 19302 df-subrg 19536 df-lmod 19639 df-lss 19707 df-lmhm 19797 df-sra 19947 df-rgmod 19948 df-dsmm 20879 df-frlm 20894

This theorem is referenced by: frlmssuvc1 20941 frlmsslsp 20943

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