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Theorem selvffval 21526
Description: Value of the "variable selection" function. (Contributed by SN, 4-Nov-2023.)
Hypotheses
Ref Expression
selvffval.i (𝜑𝐼𝑉)
selvffval.r (𝜑𝑅𝑊)
Assertion
Ref Expression
selvffval (𝜑 → (𝐼 selectVars 𝑅) = (𝑗 ∈ 𝒫 𝐼 ↦ (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))))
Distinct variable groups:   𝑗,𝐼,𝑓,𝑢,𝑡,𝑐,𝑑,𝑥   𝑅,𝑗,𝑓,𝑢,𝑡,𝑐,𝑑,𝑥
Allowed substitution hints:   𝜑(𝑥,𝑢,𝑡,𝑓,𝑗,𝑐,𝑑)   𝑉(𝑥,𝑢,𝑡,𝑓,𝑗,𝑐,𝑑)   𝑊(𝑥,𝑢,𝑡,𝑓,𝑗,𝑐,𝑑)

Proof of Theorem selvffval
Dummy variables 𝑖 𝑟 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-selv 21522 . . 3 selectVars = (𝑖 ∈ V, 𝑟 ∈ V ↦ (𝑗 ∈ 𝒫 𝑖 ↦ (𝑓 ∈ (Base‘(𝑖 mPoly 𝑟)) ↦ ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))))))
21a1i 11 . 2 (𝜑 → selectVars = (𝑖 ∈ V, 𝑟 ∈ V ↦ (𝑗 ∈ 𝒫 𝑖 ↦ (𝑓 ∈ (Base‘(𝑖 mPoly 𝑟)) ↦ ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥)))))))))
3 pweq 4574 . . . . 5 (𝑖 = 𝐼 → 𝒫 𝑖 = 𝒫 𝐼)
43adantr 481 . . . 4 ((𝑖 = 𝐼𝑟 = 𝑅) → 𝒫 𝑖 = 𝒫 𝐼)
5 oveq12 7366 . . . . . 6 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑖 mPoly 𝑟) = (𝐼 mPoly 𝑅))
65fveq2d 6846 . . . . 5 ((𝑖 = 𝐼𝑟 = 𝑅) → (Base‘(𝑖 mPoly 𝑟)) = (Base‘(𝐼 mPoly 𝑅)))
7 difeq1 4075 . . . . . . . 8 (𝑖 = 𝐼 → (𝑖𝑗) = (𝐼𝑗))
87adantr 481 . . . . . . 7 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑖𝑗) = (𝐼𝑗))
9 simpr 485 . . . . . . 7 ((𝑖 = 𝐼𝑟 = 𝑅) → 𝑟 = 𝑅)
108, 9oveq12d 7375 . . . . . 6 ((𝑖 = 𝐼𝑟 = 𝑅) → ((𝑖𝑗) mPoly 𝑟) = ((𝐼𝑗) mPoly 𝑅))
11 oveq1 7364 . . . . . . . . . . . . 13 (𝑖 = 𝐼 → (𝑖 evalSub 𝑡) = (𝐼 evalSub 𝑡))
1211adantr 481 . . . . . . . . . . . 12 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑖 evalSub 𝑡) = (𝐼 evalSub 𝑡))
1312fveq1d 6844 . . . . . . . . . . 11 ((𝑖 = 𝐼𝑟 = 𝑅) → ((𝑖 evalSub 𝑡)‘ran 𝑑) = ((𝐼 evalSub 𝑡)‘ran 𝑑))
1413fveq1d 6844 . . . . . . . . . 10 ((𝑖 = 𝐼𝑟 = 𝑅) → (((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓)) = (((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓)))
15 simpl 483 . . . . . . . . . . 11 ((𝑖 = 𝐼𝑟 = 𝑅) → 𝑖 = 𝐼)
168, 9oveq12d 7375 . . . . . . . . . . . . . 14 ((𝑖 = 𝐼𝑟 = 𝑅) → ((𝑖𝑗) mVar 𝑟) = ((𝐼𝑗) mVar 𝑅))
1716fveq1d 6844 . . . . . . . . . . . . 13 ((𝑖 = 𝐼𝑟 = 𝑅) → (((𝑖𝑗) mVar 𝑟)‘𝑥) = (((𝐼𝑗) mVar 𝑅)‘𝑥))
1817fveq2d 6846 . . . . . . . . . . . 12 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥)) = (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥)))
1918ifeq2d 4506 . . . . . . . . . . 11 ((𝑖 = 𝐼𝑟 = 𝑅) → if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))) = if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))
2015, 19mpteq12dv 5196 . . . . . . . . . 10 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥)))) = (𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥)))))
2114, 20fveq12d 6849 . . . . . . . . 9 ((𝑖 = 𝐼𝑟 = 𝑅) → ((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))) = ((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))
2221csbeq2dv 3862 . . . . . . . 8 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))) = (𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))
2322csbeq2dv 3862 . . . . . . 7 ((𝑖 = 𝐼𝑟 = 𝑅) → (algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))) = (algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))
2423csbeq2dv 3862 . . . . . 6 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))) = (𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))
2510, 24csbeq12dv 3864 . . . . 5 ((𝑖 = 𝐼𝑟 = 𝑅) → ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))) = ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))
266, 25mpteq12dv 5196 . . . 4 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑓 ∈ (Base‘(𝑖 mPoly 𝑟)) ↦ ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥)))))) = (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥)))))))
274, 26mpteq12dv 5196 . . 3 ((𝑖 = 𝐼𝑟 = 𝑅) → (𝑗 ∈ 𝒫 𝑖 ↦ (𝑓 ∈ (Base‘(𝑖 mPoly 𝑟)) ↦ ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))))) = (𝑗 ∈ 𝒫 𝐼 ↦ (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))))
2827adantl 482 . 2 ((𝜑 ∧ (𝑖 = 𝐼𝑟 = 𝑅)) → (𝑗 ∈ 𝒫 𝑖 ↦ (𝑓 ∈ (Base‘(𝑖 mPoly 𝑟)) ↦ ((𝑖𝑗) mPoly 𝑟) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝑖 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝑖 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝑖𝑗) mVar 𝑟)‘𝑥))))))) = (𝑗 ∈ 𝒫 𝐼 ↦ (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))))
29 selvffval.i . . 3 (𝜑𝐼𝑉)
3029elexd 3465 . 2 (𝜑𝐼 ∈ V)
31 selvffval.r . . 3 (𝜑𝑅𝑊)
3231elexd 3465 . 2 (𝜑𝑅 ∈ V)
3329pwexd 5334 . . 3 (𝜑 → 𝒫 𝐼 ∈ V)
3433mptexd 7174 . 2 (𝜑 → (𝑗 ∈ 𝒫 𝐼 ↦ (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))) ∈ V)
352, 28, 30, 32, 34ovmpod 7507 1 (𝜑 → (𝐼 selectVars 𝑅) = (𝑗 ∈ 𝒫 𝐼 ↦ (𝑓 ∈ (Base‘(𝐼 mPoly 𝑅)) ↦ ((𝐼𝑗) mPoly 𝑅) / 𝑢(𝑗 mPoly 𝑢) / 𝑡(algSc‘𝑡) / 𝑐(𝑐 ∘ (algSc‘𝑢)) / 𝑑((((𝐼 evalSub 𝑡)‘ran 𝑑)‘(𝑑𝑓))‘(𝑥𝐼 ↦ if(𝑥𝑗, ((𝑗 mVar 𝑢)‘𝑥), (𝑐‘(((𝐼𝑗) mVar 𝑅)‘𝑥))))))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396   = wceq 1541  wcel 2106  Vcvv 3445  csb 3855  cdif 3907  ifcif 4486  𝒫 cpw 4560  cmpt 5188  ran crn 5634  ccom 5637  cfv 6496  (class class class)co 7357  cmpo 7359  Basecbs 17083  algSccascl 21258   mVar cmvr 21307   mPoly cmpl 21308   evalSub ces 21480   selectVars cslv 21518
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2707  ax-rep 5242  ax-sep 5256  ax-nul 5263  ax-pow 5320  ax-pr 5384
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2538  df-eu 2567  df-clab 2714  df-cleq 2728  df-clel 2814  df-nfc 2889  df-ne 2944  df-ral 3065  df-rex 3074  df-reu 3354  df-rab 3408  df-v 3447  df-sbc 3740  df-csb 3856  df-dif 3913  df-un 3915  df-in 3917  df-ss 3927  df-nul 4283  df-if 4487  df-pw 4562  df-sn 4587  df-pr 4589  df-op 4593  df-uni 4866  df-iun 4956  df-br 5106  df-opab 5168  df-mpt 5189  df-id 5531  df-xp 5639  df-rel 5640  df-cnv 5641  df-co 5642  df-dm 5643  df-rn 5644  df-res 5645  df-ima 5646  df-iota 6448  df-fun 6498  df-fn 6499  df-f 6500  df-f1 6501  df-fo 6502  df-f1o 6503  df-fv 6504  df-ov 7360  df-oprab 7361  df-mpo 7362  df-selv 21522
This theorem is referenced by:  selvfval  21527
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