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Theorem msubffval 31752
Description: A substitution applied to an expression. (Contributed by Mario Carneiro, 18-Jul-2016.)
Hypotheses
Ref Expression
msubffval.v 𝑉 = (mVR‘𝑇)
msubffval.r 𝑅 = (mREx‘𝑇)
msubffval.s 𝑆 = (mSubst‘𝑇)
msubffval.e 𝐸 = (mEx‘𝑇)
msubffval.o 𝑂 = (mRSubst‘𝑇)
Assertion
Ref Expression
msubffval (𝑇𝑊𝑆 = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)))
Distinct variable groups:   𝑒,𝑓,𝐸   𝑒,𝑂,𝑓   𝑅,𝑒,𝑓   𝑇,𝑒,𝑓   𝑒,𝑉,𝑓
Allowed substitution hints:   𝑆(𝑒,𝑓)   𝑊(𝑒,𝑓)

Proof of Theorem msubffval
Dummy variable 𝑡 is distinct from all other variables.
StepHypRef Expression
1 elex 3361 . 2 (𝑇𝑊𝑇 ∈ V)
2 msubffval.s . . 3 𝑆 = (mSubst‘𝑇)
3 fveq2 6332 . . . . . . 7 (𝑡 = 𝑇 → (mREx‘𝑡) = (mREx‘𝑇))
4 msubffval.r . . . . . . 7 𝑅 = (mREx‘𝑇)
53, 4syl6eqr 2822 . . . . . 6 (𝑡 = 𝑇 → (mREx‘𝑡) = 𝑅)
6 fveq2 6332 . . . . . . 7 (𝑡 = 𝑇 → (mVR‘𝑡) = (mVR‘𝑇))
7 msubffval.v . . . . . . 7 𝑉 = (mVR‘𝑇)
86, 7syl6eqr 2822 . . . . . 6 (𝑡 = 𝑇 → (mVR‘𝑡) = 𝑉)
95, 8oveq12d 6810 . . . . 5 (𝑡 = 𝑇 → ((mREx‘𝑡) ↑pm (mVR‘𝑡)) = (𝑅pm 𝑉))
10 fveq2 6332 . . . . . . 7 (𝑡 = 𝑇 → (mEx‘𝑡) = (mEx‘𝑇))
11 msubffval.e . . . . . . 7 𝐸 = (mEx‘𝑇)
1210, 11syl6eqr 2822 . . . . . 6 (𝑡 = 𝑇 → (mEx‘𝑡) = 𝐸)
13 fveq2 6332 . . . . . . . . . 10 (𝑡 = 𝑇 → (mRSubst‘𝑡) = (mRSubst‘𝑇))
14 msubffval.o . . . . . . . . . 10 𝑂 = (mRSubst‘𝑇)
1513, 14syl6eqr 2822 . . . . . . . . 9 (𝑡 = 𝑇 → (mRSubst‘𝑡) = 𝑂)
1615fveq1d 6334 . . . . . . . 8 (𝑡 = 𝑇 → ((mRSubst‘𝑡)‘𝑓) = (𝑂𝑓))
1716fveq1d 6334 . . . . . . 7 (𝑡 = 𝑇 → (((mRSubst‘𝑡)‘𝑓)‘(2nd𝑒)) = ((𝑂𝑓)‘(2nd𝑒)))
1817opeq2d 4544 . . . . . 6 (𝑡 = 𝑇 → ⟨(1st𝑒), (((mRSubst‘𝑡)‘𝑓)‘(2nd𝑒))⟩ = ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)
1912, 18mpteq12dv 4865 . . . . 5 (𝑡 = 𝑇 → (𝑒 ∈ (mEx‘𝑡) ↦ ⟨(1st𝑒), (((mRSubst‘𝑡)‘𝑓)‘(2nd𝑒))⟩) = (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩))
209, 19mpteq12dv 4865 . . . 4 (𝑡 = 𝑇 → (𝑓 ∈ ((mREx‘𝑡) ↑pm (mVR‘𝑡)) ↦ (𝑒 ∈ (mEx‘𝑡) ↦ ⟨(1st𝑒), (((mRSubst‘𝑡)‘𝑓)‘(2nd𝑒))⟩)) = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)))
21 df-msub 31720 . . . 4 mSubst = (𝑡 ∈ V ↦ (𝑓 ∈ ((mREx‘𝑡) ↑pm (mVR‘𝑡)) ↦ (𝑒 ∈ (mEx‘𝑡) ↦ ⟨(1st𝑒), (((mRSubst‘𝑡)‘𝑓)‘(2nd𝑒))⟩)))
22 ovex 6822 . . . . 5 (𝑅pm 𝑉) ∈ V
2322mptex 6629 . . . 4 (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)) ∈ V
2420, 21, 23fvmpt 6424 . . 3 (𝑇 ∈ V → (mSubst‘𝑇) = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)))
252, 24syl5eq 2816 . 2 (𝑇 ∈ V → 𝑆 = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)))
261, 25syl 17 1 (𝑇𝑊𝑆 = (𝑓 ∈ (𝑅pm 𝑉) ↦ (𝑒𝐸 ↦ ⟨(1st𝑒), ((𝑂𝑓)‘(2nd𝑒))⟩)))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1630  wcel 2144  Vcvv 3349  cop 4320  cmpt 4861  cfv 6031  (class class class)co 6792  1st c1st 7312  2nd c2nd 7313  pm cpm 8009  mVRcmvar 31690  mRExcmrex 31695  mExcmex 31696  mRSubstcmrsub 31699  mSubstcmsub 31700
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-rep 4902  ax-sep 4912  ax-nul 4920  ax-pr 5034
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-ral 3065  df-rex 3066  df-reu 3067  df-rab 3069  df-v 3351  df-sbc 3586  df-csb 3681  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-sn 4315  df-pr 4317  df-op 4321  df-uni 4573  df-iun 4654  df-br 4785  df-opab 4845  df-mpt 4862  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-ov 6795  df-msub 31720
This theorem is referenced by:  msubfval  31753  elmsubrn  31757  msubrn  31758  msubff  31759
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