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Theorem msubff 31553
 Description: A substitution is a function from 𝐸 to 𝐸. (Contributed by Mario Carneiro, 18-Jul-2016.)
Hypotheses
Ref Expression
msubff.v 𝑉 = (mVR‘𝑇)
msubff.r 𝑅 = (mREx‘𝑇)
msubff.s 𝑆 = (mSubst‘𝑇)
msubff.e 𝐸 = (mEx‘𝑇)
Assertion
Ref Expression
msubff (𝑇𝑊𝑆:(𝑅pm 𝑉)⟶(𝐸𝑚 𝐸))

Proof of Theorem msubff
Dummy variables 𝑒 𝑓 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 xp1st 7242 . . . . . . . . 9 (𝑒 ∈ ((mTC‘𝑇) × 𝑅) → (1st𝑒) ∈ (mTC‘𝑇))
2 eqid 2651 . . . . . . . . . 10 (mTC‘𝑇) = (mTC‘𝑇)
3 msubff.e . . . . . . . . . 10 𝐸 = (mEx‘𝑇)
4 msubff.r . . . . . . . . . 10 𝑅 = (mREx‘𝑇)
52, 3, 4mexval 31525 . . . . . . . . 9 𝐸 = ((mTC‘𝑇) × 𝑅)
61, 5eleq2s 2748 . . . . . . . 8 (𝑒𝐸 → (1st𝑒) ∈ (mTC‘𝑇))
76adantl 481 . . . . . . 7 (((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) ∧ 𝑒𝐸) → (1st𝑒) ∈ (mTC‘𝑇))
8 msubff.v . . . . . . . . . . 11 𝑉 = (mVR‘𝑇)
9 eqid 2651 . . . . . . . . . . 11 (mRSubst‘𝑇) = (mRSubst‘𝑇)
108, 4, 9mrsubff 31535 . . . . . . . . . 10 (𝑇𝑊 → (mRSubst‘𝑇):(𝑅pm 𝑉)⟶(𝑅𝑚 𝑅))
1110ffvelrnda 6399 . . . . . . . . 9 ((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) → ((mRSubst‘𝑇)‘𝑓) ∈ (𝑅𝑚 𝑅))
12 elmapi 7921 . . . . . . . . 9 (((mRSubst‘𝑇)‘𝑓) ∈ (𝑅𝑚 𝑅) → ((mRSubst‘𝑇)‘𝑓):𝑅𝑅)
1311, 12syl 17 . . . . . . . 8 ((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) → ((mRSubst‘𝑇)‘𝑓):𝑅𝑅)
14 xp2nd 7243 . . . . . . . . 9 (𝑒 ∈ ((mTC‘𝑇) × 𝑅) → (2nd𝑒) ∈ 𝑅)
1514, 5eleq2s 2748 . . . . . . . 8 (𝑒𝐸 → (2nd𝑒) ∈ 𝑅)
16 ffvelrn 6397 . . . . . . . 8 ((((mRSubst‘𝑇)‘𝑓):𝑅𝑅 ∧ (2nd𝑒) ∈ 𝑅) → (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒)) ∈ 𝑅)
1713, 15, 16syl2an 493 . . . . . . 7 (((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) ∧ 𝑒𝐸) → (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒)) ∈ 𝑅)
18 opelxp 5180 . . . . . . 7 (⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩ ∈ ((mTC‘𝑇) × 𝑅) ↔ ((1st𝑒) ∈ (mTC‘𝑇) ∧ (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒)) ∈ 𝑅))
197, 17, 18sylanbrc 699 . . . . . 6 (((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) ∧ 𝑒𝐸) → ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩ ∈ ((mTC‘𝑇) × 𝑅))
2019, 5syl6eleqr 2741 . . . . 5 (((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) ∧ 𝑒𝐸) → ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩ ∈ 𝐸)
21 eqid 2651 . . . . 5 (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩) = (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩)
2220, 21fmptd 6425 . . . 4 ((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) → (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩):𝐸𝐸)
23 fvex 6239 . . . . . 6 (mEx‘𝑇) ∈ V
243, 23eqeltri 2726 . . . . 5 𝐸 ∈ V
2524, 24elmap 7928 . . . 4 ((𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩) ∈ (𝐸𝑚 𝐸) ↔ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩):𝐸𝐸)
2622, 25sylibr 224 . . 3 ((𝑇𝑊𝑓 ∈ (𝑅pm 𝑉)) → (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩) ∈ (𝐸𝑚 𝐸))
27 eqid 2651 . . 3 (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩)) = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩))
2826, 27fmptd 6425 . 2 (𝑇𝑊 → (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩)):(𝑅pm 𝑉)⟶(𝐸𝑚 𝐸))
29 msubff.s . . . 4 𝑆 = (mSubst‘𝑇)
308, 4, 29, 3, 9msubffval 31546 . . 3 (𝑇𝑊𝑆 = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩)))
3130feq1d 6068 . 2 (𝑇𝑊 → (𝑆:(𝑅pm 𝑉)⟶(𝐸𝑚 𝐸) ↔ (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), (((mRSubst‘𝑇)‘𝑓)‘(2nd𝑒))⟩)):(𝑅pm 𝑉)⟶(𝐸𝑚 𝐸)))
3228, 31mpbird 247 1 (𝑇𝑊𝑆:(𝑅pm 𝑉)⟶(𝐸𝑚 𝐸))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 383   = wceq 1523   ∈ wcel 2030  Vcvv 3231  ⟨cop 4216   ↦ cmpt 4762   × cxp 5141  ⟶wf 5922  ‘cfv 5926  (class class class)co 6690  1st c1st 7208  2nd c2nd 7209   ↑𝑚 cmap 7899   ↑pm cpm 7900  mVRcmvar 31484  mTCcmtc 31487  mRExcmrex 31489  mExcmex 31490  mRSubstcmrsub 31493  mSubstcmsub 31494 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-pm 7902  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-card 8803  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-2 11117  df-n0 11331  df-z 11416  df-uz 11726  df-fz 12365  df-fzo 12505  df-seq 12842  df-hash 13158  df-word 13331  df-concat 13333  df-s1 13334  df-struct 15906  df-ndx 15907  df-slot 15908  df-base 15910  df-sets 15911  df-ress 15912  df-plusg 16001  df-0g 16149  df-gsum 16150  df-mgm 17289  df-sgrp 17331  df-mnd 17342  df-submnd 17383  df-frmd 17433  df-mrex 31509  df-mex 31510  df-mrsub 31513  df-msub 31514 This theorem is referenced by:  msubf  31555  msubff1  31579  mclsind  31593
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