mrsubcn - Mathbox for Mario Carneiro

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Theorem mrsubcn 35720

Description: A substitution does not change the value of constant substrings. (Contributed by Mario Carneiro, 18-Jul-2016.)

**Hypotheses**
Ref	Expression
mrsubccat.s	⊢ 𝑆 = (mRSubst‘𝑇)
mrsubccat.r	⊢ 𝑅 = (mREx‘𝑇)
mrsubcn.v	⊢ 𝑉 = (mVR‘𝑇)
mrsubcn.c	⊢ 𝐶 = (mCN‘𝑇)

**Assertion**
Ref	Expression
mrsubcn	⊢ ((𝐹 ∈ ran 𝑆 ∧ 𝑋 ∈ (𝐶 ∖ 𝑉)) → (𝐹‘⟨“𝑋”⟩) = ⟨“𝑋”⟩)

Proof of Theorem mrsubcn Dummy variable 𝑓 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		n0i 4281	. . . . 5 ⊢ (𝐹 ∈ ran 𝑆 → ¬ ran 𝑆 = ∅)
2		mrsubccat.s	. . . . . 6 ⊢ 𝑆 = (mRSubst‘𝑇)
3	2	rnfvprc 6829	. . . . 5 ⊢ (¬ 𝑇 ∈ V → ran 𝑆 = ∅)
4	1, 3	nsyl2 141	. . . 4 ⊢ (𝐹 ∈ ran 𝑆 → 𝑇 ∈ V)
5		mrsubcn.v	. . . . 5 ⊢ 𝑉 = (mVR‘𝑇)
6		mrsubccat.r	. . . . 5 ⊢ 𝑅 = (mREx‘𝑇)
7	5, 6, 2	mrsubff 35713	. . . 4 ⊢ (𝑇 ∈ V → 𝑆:(𝑅 ↑_pm 𝑉)⟶(𝑅 ↑_m 𝑅))
8		ffun 6666	. . . 4 ⊢ (𝑆:(𝑅 ↑_pm 𝑉)⟶(𝑅 ↑_m 𝑅) → Fun 𝑆)
9	4, 7, 8	3syl 18	. . 3 ⊢ (𝐹 ∈ ran 𝑆 → Fun 𝑆)
10	5, 6, 2	mrsubrn 35714	. . . . 5 ⊢ ran 𝑆 = (𝑆 “ (𝑅 ↑_m 𝑉))
11	10	eleq2i 2829	. . . 4 ⊢ (𝐹 ∈ ran 𝑆 ↔ 𝐹 ∈ (𝑆 “ (𝑅 ↑_m 𝑉)))
12	11	biimpi 216	. . 3 ⊢ (𝐹 ∈ ran 𝑆 → 𝐹 ∈ (𝑆 “ (𝑅 ↑_m 𝑉)))
13		fvelima 6900	. . 3 ⊢ ((Fun 𝑆 ∧ 𝐹 ∈ (𝑆 “ (𝑅 ↑_m 𝑉))) → ∃𝑓 ∈ (𝑅 ↑_m 𝑉)(𝑆‘𝑓) = 𝐹)
14	9, 12, 13	syl2anc 585	. 2 ⊢ (𝐹 ∈ ran 𝑆 → ∃𝑓 ∈ (𝑅 ↑_m 𝑉)(𝑆‘𝑓) = 𝐹)
15		elmapi 8790	. . . . . . 7 ⊢ (𝑓 ∈ (𝑅 ↑_m 𝑉) → 𝑓:𝑉⟶𝑅)
16	15	adantl 481	. . . . . 6 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → 𝑓:𝑉⟶𝑅)
17		ssidd 3946	. . . . . 6 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → 𝑉 ⊆ 𝑉)
18		eldifi 4072	. . . . . . . 8 ⊢ (𝑋 ∈ (𝐶 ∖ 𝑉) → 𝑋 ∈ 𝐶)
19		elun1 4123	. . . . . . . 8 ⊢ (𝑋 ∈ 𝐶 → 𝑋 ∈ (𝐶 ∪ 𝑉))
20	18, 19	syl 17	. . . . . . 7 ⊢ (𝑋 ∈ (𝐶 ∖ 𝑉) → 𝑋 ∈ (𝐶 ∪ 𝑉))
21	20	adantr 480	. . . . . 6 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → 𝑋 ∈ (𝐶 ∪ 𝑉))
22		mrsubcn.c	. . . . . . 7 ⊢ 𝐶 = (mCN‘𝑇)
23	22, 5, 6, 2	mrsubcv 35711	. . . . . 6 ⊢ ((𝑓:𝑉⟶𝑅 ∧ 𝑉 ⊆ 𝑉 ∧ 𝑋 ∈ (𝐶 ∪ 𝑉)) → ((𝑆‘𝑓)‘⟨“𝑋”⟩) = if(𝑋 ∈ 𝑉, (𝑓‘𝑋), ⟨“𝑋”⟩))
24	16, 17, 21, 23	syl3anc 1374	. . . . 5 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → ((𝑆‘𝑓)‘⟨“𝑋”⟩) = if(𝑋 ∈ 𝑉, (𝑓‘𝑋), ⟨“𝑋”⟩))
25		eldifn 4073	. . . . . . 7 ⊢ (𝑋 ∈ (𝐶 ∖ 𝑉) → ¬ 𝑋 ∈ 𝑉)
26	25	adantr 480	. . . . . 6 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → ¬ 𝑋 ∈ 𝑉)
27	26	iffalsed 4478	. . . . 5 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → if(𝑋 ∈ 𝑉, (𝑓‘𝑋), ⟨“𝑋”⟩) = ⟨“𝑋”⟩)
28	24, 27	eqtrd 2772	. . . 4 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → ((𝑆‘𝑓)‘⟨“𝑋”⟩) = ⟨“𝑋”⟩)
29		fveq1 6834	. . . . 5 ⊢ ((𝑆‘𝑓) = 𝐹 → ((𝑆‘𝑓)‘⟨“𝑋”⟩) = (𝐹‘⟨“𝑋”⟩))
30	29	eqeq1d 2739	. . . 4 ⊢ ((𝑆‘𝑓) = 𝐹 → (((𝑆‘𝑓)‘⟨“𝑋”⟩) = ⟨“𝑋”⟩ ↔ (𝐹‘⟨“𝑋”⟩) = ⟨“𝑋”⟩))
31	28, 30	syl5ibcom 245	. . 3 ⊢ ((𝑋 ∈ (𝐶 ∖ 𝑉) ∧ 𝑓 ∈ (𝑅 ↑_m 𝑉)) → ((𝑆‘𝑓) = 𝐹 → (𝐹‘⟨“𝑋”⟩) = ⟨“𝑋”⟩))
32	31	rexlimdva 3139	. 2 ⊢ (𝑋 ∈ (𝐶 ∖ 𝑉) → (∃𝑓 ∈ (𝑅 ↑_m 𝑉)(𝑆‘𝑓) = 𝐹 → (𝐹‘⟨“𝑋”⟩) = ⟨“𝑋”⟩))
33	14, 32	mpan9 506	1 ⊢ ((𝐹 ∈ ran 𝑆 ∧ 𝑋 ∈ (𝐶 ∖ 𝑉)) → (𝐹‘⟨“𝑋”⟩) = ⟨“𝑋”⟩)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 Vcvv 3430 ∖ cdif 3887 ∪ cun 3888 ⊆ wss 3890 ∅c0 4274 ifcif 4467 ran crn 5626 “ cima 5628 Fun wfun 6487 ⟶wf 6489 ‘cfv 6493 (class class class)co 7361 ↑_m cmap 8767 ↑_pm cpm 8768 ⟨“cs1 14552 mCNcmcn 35661 mVRcmvar 35662 mRExcmrex 35667 mRSubstcmrsub 35671

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-1st 7936 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-er 8637 df-map 8769 df-pm 8770 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-card 9857 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-nn 12169 df-2 12238 df-n0 12432 df-z 12519 df-uz 12783 df-fz 13456 df-fzo 13603 df-seq 13958 df-hash 14287 df-word 14470 df-concat 14527 df-s1 14553 df-struct 17111 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 df-plusg 17227 df-0g 17398 df-gsum 17399 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-submnd 18746 df-frmd 18811 df-mrex 35687 df-mrsub 35691

This theorem is referenced by: elmrsubrn 35721 mrsubco 35722 mrsubvrs 35723

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