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Theorem dssmapfvd 45110
Description: Value of the duality operator for self-mappings of subsets of a base set, 𝐵. (Contributed by RP, 19-Apr-2021.)
Hypotheses
Ref Expression
dssmapfvd.o 𝑂 = (𝑏 ∈ V ↦ (𝑓 ∈ (𝒫 𝑏 ↑m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏 ∖ 𝑠))))))
dssmapfvd.d 𝐷 = (𝑂‘𝐵)
dssmapfvd.b (𝜑 → 𝐵 ∈ 𝑉)
Assertion
Ref Expression
dssmapfvd (𝜑 → 𝐷 = (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))))
Distinct variable groups:   𝐵,𝑏,𝑓   𝐵,𝑠,𝑏   𝜑,𝑏
Allowed substitution hints:   𝜑(𝑓, 𝑠)   𝐷(𝑓, 𝑠, 𝑏)   𝑂(𝑓, 𝑠, 𝑏)   𝑉(𝑓, 𝑠, 𝑏)

Proof of Theorem dssmapfvd
StepHypRef Expression
1 dssmapfvd.d . 2 𝐷 = (𝑂‘𝐵)
2 dssmapfvd.o . . 3 𝑂 = (𝑏 ∈ V ↦ (𝑓 ∈ (𝒫 𝑏 ↑m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏 ∖ 𝑠))))))
3 pweq 4570 . . . . 5 (𝑏 = 𝐵 → 𝒫 𝑏 = 𝒫 𝐵)
43, 3oveq12d 7438 . . . 4 (𝑏 = 𝐵 → (𝒫 𝑏 ↑m 𝒫 𝑏) = (𝒫 𝐵 ↑m 𝒫 𝐵))
5 id 23 . . . . . 6 (𝑏 = 𝐵 → 𝑏 = 𝐵)
6 difeq1 4056 . . . . . . 7 (𝑏 = 𝐵 → (𝑏 ∖ 𝑠) = (𝐵 ∖ 𝑠))
76fveq2d 6889 . . . . . 6 (𝑏 = 𝐵 → (𝑓‘(𝑏 ∖ 𝑠)) = (𝑓‘(𝐵 ∖ 𝑠)))
85, 7difeq12d 4064 . . . . 5 (𝑏 = 𝐵 → (𝑏 ∖ (𝑓‘(𝑏 ∖ 𝑠))) = (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))
93, 8mpteq12dv 5191 . . . 4 (𝑏 = 𝐵 → (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏 ∖ 𝑠)))) = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠)))))
104, 9mpteq12dv 5191 . . 3 (𝑏 = 𝐵 → (𝑓 ∈ (𝒫 𝑏 ↑m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏 ∖ 𝑠))))) = (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))))
11 dssmapfvd.b . . . 4 (𝜑 → 𝐵 ∈ 𝑉)
1211elexd 3473 . . 3 (𝜑 → 𝐵 ∈ V)
13 ovex 7453 . . . 4 (𝒫 𝐵 ↑m 𝒫 𝐵) ∈ V
14 mptexg 7227 . . . 4 ((𝒫 𝐵 ↑m 𝒫 𝐵) ∈ V → (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))) ∈ V)
1513, 14mp1i 14 . . 3 (𝜑 → (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))) ∈ V)
162, 10, 12, 15fvmptd3 7017 . 2 (𝜑 → (𝑂‘𝐵) = (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))))
171, 16eqtrid 2807 1 (𝜑 → 𝐷 = (𝑓 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵 ∖ 𝑠))))))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569   ∈ wcel 2144  Vcvv 3450   ∖ cdif 4045  𝒫 cpw 4556   ↦ cmpt 5185  ‘cfv 6538  (class class class)co 7420   ↑m cmap 8850
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-rep 5231  ax-sep 5248  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-iun 4952  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-res 5662  df-ima 5663  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-ov 7423
This theorem is used by:  dssmapfv2d  45111  dssmapnvod  45113  dssmapf1od  45114
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