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Theorem dssmapnvod 41517
Description: For any base set 𝐵 the duality operator for self-mappings of subsets of that base set is its own inverse, an involution. (Contributed by RP, 20-Apr-2021.)
Hypotheses
Ref Expression
dssmapfvd.o 𝑂 = (𝑏 ∈ V ↦ (𝑓 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠))))))
dssmapfvd.d 𝐷 = (𝑂𝐵)
dssmapfvd.b (𝜑𝐵𝑉)
Assertion
Ref Expression
dssmapnvod (𝜑𝐷 = 𝐷)
Distinct variable groups:   𝐵,𝑏,𝑓,𝑠   𝜑,𝑏,𝑓,𝑠
Allowed substitution hints:   𝐷(𝑓,𝑠,𝑏)   𝑂(𝑓,𝑠,𝑏)   𝑉(𝑓,𝑠,𝑏)

Proof of Theorem dssmapnvod
Dummy variables 𝑔 𝑧 𝑡 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpr 484 . . . . . . . . 9 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))
2 difeq2 4047 . . . . . . . . . . . 12 (𝑠 = 𝑡 → (𝐵𝑠) = (𝐵𝑡))
32fveq2d 6760 . . . . . . . . . . 11 (𝑠 = 𝑡 → (𝑓‘(𝐵𝑠)) = (𝑓‘(𝐵𝑡)))
43difeq2d 4053 . . . . . . . . . 10 (𝑠 = 𝑡 → (𝐵 ∖ (𝑓‘(𝐵𝑠))) = (𝐵 ∖ (𝑓‘(𝐵𝑡))))
54cbvmptv 5183 . . . . . . . . 9 (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))) = (𝑡 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑡))))
61, 5eqtrdi 2795 . . . . . . . 8 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → 𝑔 = (𝑡 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑡)))))
7 ssun1 4102 . . . . . . . . . . . 12 𝐵 ⊆ (𝐵 ∪ (𝑓‘(𝐵𝑡)))
87sspwi 4544 . . . . . . . . . . 11 𝒫 𝐵 ⊆ 𝒫 (𝐵 ∪ (𝑓‘(𝐵𝑡)))
9 dssmapfvd.b . . . . . . . . . . . 12 (𝜑𝐵𝑉)
10 pwidg 4552 . . . . . . . . . . . 12 (𝐵𝑉𝐵 ∈ 𝒫 𝐵)
119, 10syl 17 . . . . . . . . . . 11 (𝜑𝐵 ∈ 𝒫 𝐵)
128, 11sselid 3915 . . . . . . . . . 10 (𝜑𝐵 ∈ 𝒫 (𝐵 ∪ (𝑓‘(𝐵𝑡))))
13 fvex 6769 . . . . . . . . . . 11 (𝑓‘(𝐵𝑡)) ∈ V
1413elpwun 7597 . . . . . . . . . 10 (𝐵 ∈ 𝒫 (𝐵 ∪ (𝑓‘(𝐵𝑡))) ↔ (𝐵 ∖ (𝑓‘(𝐵𝑡))) ∈ 𝒫 𝐵)
1512, 14sylib 217 . . . . . . . . 9 (𝜑 → (𝐵 ∖ (𝑓‘(𝐵𝑡))) ∈ 𝒫 𝐵)
1615ad2antrr 722 . . . . . . . 8 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵𝑡))) ∈ 𝒫 𝐵)
176, 16fmpt3d 6972 . . . . . . 7 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → 𝑔:𝒫 𝐵⟶𝒫 𝐵)
189pwexd 5297 . . . . . . . . 9 (𝜑 → 𝒫 𝐵 ∈ V)
1918adantr 480 . . . . . . . 8 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → 𝒫 𝐵 ∈ V)
2019, 19elmapd 8587 . . . . . . 7 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ↔ 𝑔:𝒫 𝐵⟶𝒫 𝐵))
2117, 20mpbird 256 . . . . . 6 ((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) → 𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵))
2221adantrl 712 . . . . 5 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → 𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵))
23 simplr 765 . . . . . . . . . . . 12 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))
24 difeq2 4047 . . . . . . . . . . . . . . 15 (𝑠 = 𝑢 → (𝐵𝑠) = (𝐵𝑢))
2524fveq2d 6760 . . . . . . . . . . . . . 14 (𝑠 = 𝑢 → (𝑓‘(𝐵𝑠)) = (𝑓‘(𝐵𝑢)))
2625difeq2d 4053 . . . . . . . . . . . . 13 (𝑠 = 𝑢 → (𝐵 ∖ (𝑓‘(𝐵𝑠))) = (𝐵 ∖ (𝑓‘(𝐵𝑢))))
2726cbvmptv 5183 . . . . . . . . . . . 12 (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))) = (𝑢 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑢))))
2823, 27eqtrdi 2795 . . . . . . . . . . 11 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑔 = (𝑢 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑢)))))
29 difeq2 4047 . . . . . . . . . . . . . 14 (𝑢 = (𝐵𝑡) → (𝐵𝑢) = (𝐵 ∖ (𝐵𝑡)))
3029fveq2d 6760 . . . . . . . . . . . . 13 (𝑢 = (𝐵𝑡) → (𝑓‘(𝐵𝑢)) = (𝑓‘(𝐵 ∖ (𝐵𝑡))))
3130difeq2d 4053 . . . . . . . . . . . 12 (𝑢 = (𝐵𝑡) → (𝐵 ∖ (𝑓‘(𝐵𝑢))) = (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))))
3231adantl 481 . . . . . . . . . . 11 ((((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) ∧ 𝑢 = (𝐵𝑡)) → (𝐵 ∖ (𝑓‘(𝐵𝑢))) = (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))))
33 ssun1 4102 . . . . . . . . . . . . . . 15 𝐵 ⊆ (𝐵𝑡)
3433sspwi 4544 . . . . . . . . . . . . . 14 𝒫 𝐵 ⊆ 𝒫 (𝐵𝑡)
3534, 11sselid 3915 . . . . . . . . . . . . 13 (𝜑𝐵 ∈ 𝒫 (𝐵𝑡))
36 vex 3426 . . . . . . . . . . . . . 14 𝑡 ∈ V
3736elpwun 7597 . . . . . . . . . . . . 13 (𝐵 ∈ 𝒫 (𝐵𝑡) ↔ (𝐵𝑡) ∈ 𝒫 𝐵)
3835, 37sylib 217 . . . . . . . . . . . 12 (𝜑 → (𝐵𝑡) ∈ 𝒫 𝐵)
3938ad2antrr 722 . . . . . . . . . . 11 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵𝑡) ∈ 𝒫 𝐵)
409difexd 5248 . . . . . . . . . . . 12 (𝜑 → (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))) ∈ V)
4140ad2antrr 722 . . . . . . . . . . 11 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))) ∈ V)
4228, 32, 39, 41fvmptd 6864 . . . . . . . . . 10 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑔‘(𝐵𝑡)) = (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))))
4342difeq2d 4053 . . . . . . . . 9 (((𝜑𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵𝑡))) = (𝐵 ∖ (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡))))))
4443adantlrl 716 . . . . . . . 8 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵𝑡))) = (𝐵 ∖ (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡))))))
45 elpwi 4539 . . . . . . . . . . . . 13 (𝑡 ∈ 𝒫 𝐵𝑡𝐵)
46 dfss4 4189 . . . . . . . . . . . . 13 (𝑡𝐵 ↔ (𝐵 ∖ (𝐵𝑡)) = 𝑡)
4745, 46sylib 217 . . . . . . . . . . . 12 (𝑡 ∈ 𝒫 𝐵 → (𝐵 ∖ (𝐵𝑡)) = 𝑡)
4847fveq2d 6760 . . . . . . . . . . 11 (𝑡 ∈ 𝒫 𝐵 → (𝑓‘(𝐵 ∖ (𝐵𝑡))) = (𝑓𝑡))
4948difeq2d 4053 . . . . . . . . . 10 (𝑡 ∈ 𝒫 𝐵 → (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡)))) = (𝐵 ∖ (𝑓𝑡)))
5049difeq2d 4053 . . . . . . . . 9 (𝑡 ∈ 𝒫 𝐵 → (𝐵 ∖ (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡))))) = (𝐵 ∖ (𝐵 ∖ (𝑓𝑡))))
5150adantl 481 . . . . . . . 8 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑓‘(𝐵 ∖ (𝐵𝑡))))) = (𝐵 ∖ (𝐵 ∖ (𝑓𝑡))))
5218, 18elmapd 8587 . . . . . . . . . . . . 13 (𝜑 → (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ↔ 𝑓:𝒫 𝐵⟶𝒫 𝐵))
5352biimpa 476 . . . . . . . . . . . 12 ((𝜑𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵)) → 𝑓:𝒫 𝐵⟶𝒫 𝐵)
5453ffvelrnda 6943 . . . . . . . . . . 11 (((𝜑𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑓𝑡) ∈ 𝒫 𝐵)
5554elpwid 4541 . . . . . . . . . 10 (((𝜑𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑓𝑡) ⊆ 𝐵)
56 dfss4 4189 . . . . . . . . . 10 ((𝑓𝑡) ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ (𝑓𝑡))) = (𝑓𝑡))
5755, 56sylib 217 . . . . . . . . 9 (((𝜑𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑓𝑡))) = (𝑓𝑡))
5857adantlrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑓𝑡))) = (𝑓𝑡))
5944, 51, 583eqtrrd 2783 . . . . . . 7 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑓𝑡) = (𝐵 ∖ (𝑔‘(𝐵𝑡))))
6059ralrimiva 3107 . . . . . 6 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → ∀𝑡 ∈ 𝒫 𝐵(𝑓𝑡) = (𝐵 ∖ (𝑔‘(𝐵𝑡))))
61 elmapfn 8611 . . . . . . . 8 (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) → 𝑓 Fn 𝒫 𝐵)
6261ad2antrl 724 . . . . . . 7 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → 𝑓 Fn 𝒫 𝐵)
63 difeq2 4047 . . . . . . . . 9 (𝑡 = 𝑧 → (𝐵𝑡) = (𝐵𝑧))
6463fveq2d 6760 . . . . . . . 8 (𝑡 = 𝑧 → (𝑔‘(𝐵𝑡)) = (𝑔‘(𝐵𝑧)))
6564difeq2d 4053 . . . . . . 7 (𝑡 = 𝑧 → (𝐵 ∖ (𝑔‘(𝐵𝑡))) = (𝐵 ∖ (𝑔‘(𝐵𝑧))))
669difexd 5248 . . . . . . . 8 (𝜑 → (𝐵 ∖ (𝑔‘(𝐵𝑡))) ∈ V)
6766ad2antrr 722 . . . . . . 7 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵𝑡))) ∈ V)
689difexd 5248 . . . . . . . 8 (𝜑 → (𝐵 ∖ (𝑔‘(𝐵𝑧))) ∈ V)
6968ad2antrr 722 . . . . . . 7 (((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) ∧ 𝑧 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵𝑧))) ∈ V)
7062, 65, 67, 69fnmptfvd 6900 . . . . . 6 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → (𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))) ↔ ∀𝑡 ∈ 𝒫 𝐵(𝑓𝑡) = (𝐵 ∖ (𝑔‘(𝐵𝑡)))))
7160, 70mpbird 256 . . . . 5 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))
7222, 71jca 511 . . . 4 ((𝜑 ∧ (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))) → (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))))
73 simpr 484 . . . . . . . . 9 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))
74 difeq2 4047 . . . . . . . . . . . 12 (𝑧 = 𝑡 → (𝐵𝑧) = (𝐵𝑡))
7574fveq2d 6760 . . . . . . . . . . 11 (𝑧 = 𝑡 → (𝑔‘(𝐵𝑧)) = (𝑔‘(𝐵𝑡)))
7675difeq2d 4053 . . . . . . . . . 10 (𝑧 = 𝑡 → (𝐵 ∖ (𝑔‘(𝐵𝑧))) = (𝐵 ∖ (𝑔‘(𝐵𝑡))))
7776cbvmptv 5183 . . . . . . . . 9 (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))) = (𝑡 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑡))))
7873, 77eqtrdi 2795 . . . . . . . 8 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → 𝑓 = (𝑡 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑡)))))
79 ssun1 4102 . . . . . . . . . . . 12 𝐵 ⊆ (𝐵 ∪ (𝑔‘(𝐵𝑡)))
8079sspwi 4544 . . . . . . . . . . 11 𝒫 𝐵 ⊆ 𝒫 (𝐵 ∪ (𝑔‘(𝐵𝑡)))
8180, 11sselid 3915 . . . . . . . . . 10 (𝜑𝐵 ∈ 𝒫 (𝐵 ∪ (𝑔‘(𝐵𝑡))))
82 fvex 6769 . . . . . . . . . . 11 (𝑔‘(𝐵𝑡)) ∈ V
8382elpwun 7597 . . . . . . . . . 10 (𝐵 ∈ 𝒫 (𝐵 ∪ (𝑔‘(𝐵𝑡))) ↔ (𝐵 ∖ (𝑔‘(𝐵𝑡))) ∈ 𝒫 𝐵)
8481, 83sylib 217 . . . . . . . . 9 (𝜑 → (𝐵 ∖ (𝑔‘(𝐵𝑡))) ∈ 𝒫 𝐵)
8584ad2antrr 722 . . . . . . . 8 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵𝑡))) ∈ 𝒫 𝐵)
8678, 85fmpt3d 6972 . . . . . . 7 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → 𝑓:𝒫 𝐵⟶𝒫 𝐵)
8718adantr 480 . . . . . . . 8 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → 𝒫 𝐵 ∈ V)
8887, 87elmapd 8587 . . . . . . 7 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ↔ 𝑓:𝒫 𝐵⟶𝒫 𝐵))
8986, 88mpbird 256 . . . . . 6 ((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) → 𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵))
9089adantrl 712 . . . . 5 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → 𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵))
91 simplr 765 . . . . . . . . . . . 12 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))
92 difeq2 4047 . . . . . . . . . . . . . . 15 (𝑧 = 𝑢 → (𝐵𝑧) = (𝐵𝑢))
9392fveq2d 6760 . . . . . . . . . . . . . 14 (𝑧 = 𝑢 → (𝑔‘(𝐵𝑧)) = (𝑔‘(𝐵𝑢)))
9493difeq2d 4053 . . . . . . . . . . . . 13 (𝑧 = 𝑢 → (𝐵 ∖ (𝑔‘(𝐵𝑧))) = (𝐵 ∖ (𝑔‘(𝐵𝑢))))
9594cbvmptv 5183 . . . . . . . . . . . 12 (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))) = (𝑢 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑢))))
9691, 95eqtrdi 2795 . . . . . . . . . . 11 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑓 = (𝑢 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑢)))))
9729fveq2d 6760 . . . . . . . . . . . . 13 (𝑢 = (𝐵𝑡) → (𝑔‘(𝐵𝑢)) = (𝑔‘(𝐵 ∖ (𝐵𝑡))))
9897difeq2d 4053 . . . . . . . . . . . 12 (𝑢 = (𝐵𝑡) → (𝐵 ∖ (𝑔‘(𝐵𝑢))) = (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))))
9998adantl 481 . . . . . . . . . . 11 ((((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) ∧ 𝑢 = (𝐵𝑡)) → (𝐵 ∖ (𝑔‘(𝐵𝑢))) = (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))))
10038ad2antrr 722 . . . . . . . . . . 11 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵𝑡) ∈ 𝒫 𝐵)
1019difexd 5248 . . . . . . . . . . . 12 (𝜑 → (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))) ∈ V)
102101ad2antrr 722 . . . . . . . . . . 11 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))) ∈ V)
10396, 99, 100, 102fvmptd 6864 . . . . . . . . . 10 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑓‘(𝐵𝑡)) = (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))))
104103difeq2d 4053 . . . . . . . . 9 (((𝜑𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵𝑡))) = (𝐵 ∖ (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡))))))
105104adantlrl 716 . . . . . . . 8 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵𝑡))) = (𝐵 ∖ (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡))))))
10647fveq2d 6760 . . . . . . . . . . 11 (𝑡 ∈ 𝒫 𝐵 → (𝑔‘(𝐵 ∖ (𝐵𝑡))) = (𝑔𝑡))
107106difeq2d 4053 . . . . . . . . . 10 (𝑡 ∈ 𝒫 𝐵 → (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡)))) = (𝐵 ∖ (𝑔𝑡)))
108107difeq2d 4053 . . . . . . . . 9 (𝑡 ∈ 𝒫 𝐵 → (𝐵 ∖ (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡))))) = (𝐵 ∖ (𝐵 ∖ (𝑔𝑡))))
109108adantl 481 . . . . . . . 8 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑔‘(𝐵 ∖ (𝐵𝑡))))) = (𝐵 ∖ (𝐵 ∖ (𝑔𝑡))))
11018, 18elmapd 8587 . . . . . . . . . . . . 13 (𝜑 → (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ↔ 𝑔:𝒫 𝐵⟶𝒫 𝐵))
111110biimpa 476 . . . . . . . . . . . 12 ((𝜑𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵)) → 𝑔:𝒫 𝐵⟶𝒫 𝐵)
112111ffvelrnda 6943 . . . . . . . . . . 11 (((𝜑𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑔𝑡) ∈ 𝒫 𝐵)
113112elpwid 4541 . . . . . . . . . 10 (((𝜑𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑔𝑡) ⊆ 𝐵)
114 dfss4 4189 . . . . . . . . . 10 ((𝑔𝑡) ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ (𝑔𝑡))) = (𝑔𝑡))
115113, 114sylib 217 . . . . . . . . 9 (((𝜑𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵)) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑔𝑡))) = (𝑔𝑡))
116115adantlrr 717 . . . . . . . 8 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝐵 ∖ (𝑔𝑡))) = (𝑔𝑡))
117105, 109, 1163eqtrrd 2783 . . . . . . 7 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝑔𝑡) = (𝐵 ∖ (𝑓‘(𝐵𝑡))))
118117ralrimiva 3107 . . . . . 6 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → ∀𝑡 ∈ 𝒫 𝐵(𝑔𝑡) = (𝐵 ∖ (𝑓‘(𝐵𝑡))))
119 elmapfn 8611 . . . . . . . 8 (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) → 𝑔 Fn 𝒫 𝐵)
120119ad2antrl 724 . . . . . . 7 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → 𝑔 Fn 𝒫 𝐵)
121 difeq2 4047 . . . . . . . . 9 (𝑡 = 𝑠 → (𝐵𝑡) = (𝐵𝑠))
122121fveq2d 6760 . . . . . . . 8 (𝑡 = 𝑠 → (𝑓‘(𝐵𝑡)) = (𝑓‘(𝐵𝑠)))
123122difeq2d 4053 . . . . . . 7 (𝑡 = 𝑠 → (𝐵 ∖ (𝑓‘(𝐵𝑡))) = (𝐵 ∖ (𝑓‘(𝐵𝑠))))
1249difexd 5248 . . . . . . . 8 (𝜑 → (𝐵 ∖ (𝑓‘(𝐵𝑡))) ∈ V)
125124ad2antrr 722 . . . . . . 7 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵𝑡))) ∈ V)
1269difexd 5248 . . . . . . . 8 (𝜑 → (𝐵 ∖ (𝑓‘(𝐵𝑠))) ∈ V)
127126ad2antrr 722 . . . . . . 7 (((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) ∧ 𝑠 ∈ 𝒫 𝐵) → (𝐵 ∖ (𝑓‘(𝐵𝑠))) ∈ V)
128120, 123, 125, 127fnmptfvd 6900 . . . . . 6 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → (𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))) ↔ ∀𝑡 ∈ 𝒫 𝐵(𝑔𝑡) = (𝐵 ∖ (𝑓‘(𝐵𝑡)))))
129118, 128mpbird 256 . . . . 5 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠)))))
13090, 129jca 511 . . . 4 ((𝜑 ∧ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))) → (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))))
13172, 130impbida 797 . . 3 (𝜑 → ((𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑔 = (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) ↔ (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ∧ 𝑓 = (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧)))))))
132131mptcnv 6032 . 2 (𝜑(𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))) = (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ↦ (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))))
133 dssmapfvd.o . . . 4 𝑂 = (𝑏 ∈ V ↦ (𝑓 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠))))))
134 dssmapfvd.d . . . 4 𝐷 = (𝑂𝐵)
135133, 134, 9dssmapfvd 41514 . . 3 (𝜑𝐷 = (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))))
136135cnveqd 5773 . 2 (𝜑𝐷 = (𝑓 ∈ (𝒫 𝐵m 𝒫 𝐵) ↦ (𝑠 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑓‘(𝐵𝑠))))))
137 fveq1 6755 . . . . . . . . 9 (𝑓 = 𝑔 → (𝑓‘(𝑏𝑠)) = (𝑔‘(𝑏𝑠)))
138137difeq2d 4053 . . . . . . . 8 (𝑓 = 𝑔 → (𝑏 ∖ (𝑓‘(𝑏𝑠))) = (𝑏 ∖ (𝑔‘(𝑏𝑠))))
139138mpteq2dv 5172 . . . . . . 7 (𝑓 = 𝑔 → (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠)))) = (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑠)))))
140 difeq2 4047 . . . . . . . . . 10 (𝑠 = 𝑧 → (𝑏𝑠) = (𝑏𝑧))
141140fveq2d 6760 . . . . . . . . 9 (𝑠 = 𝑧 → (𝑔‘(𝑏𝑠)) = (𝑔‘(𝑏𝑧)))
142141difeq2d 4053 . . . . . . . 8 (𝑠 = 𝑧 → (𝑏 ∖ (𝑔‘(𝑏𝑠))) = (𝑏 ∖ (𝑔‘(𝑏𝑧))))
143142cbvmptv 5183 . . . . . . 7 (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑠)))) = (𝑧 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑧))))
144139, 143eqtrdi 2795 . . . . . 6 (𝑓 = 𝑔 → (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠)))) = (𝑧 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑧)))))
145144cbvmptv 5183 . . . . 5 (𝑓 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠))))) = (𝑔 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑧 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑧)))))
146145mpteq2i 5175 . . . 4 (𝑏 ∈ V ↦ (𝑓 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑠 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑓‘(𝑏𝑠)))))) = (𝑏 ∈ V ↦ (𝑔 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑧 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑧))))))
147133, 146eqtri 2766 . . 3 𝑂 = (𝑏 ∈ V ↦ (𝑔 ∈ (𝒫 𝑏m 𝒫 𝑏) ↦ (𝑧 ∈ 𝒫 𝑏 ↦ (𝑏 ∖ (𝑔‘(𝑏𝑧))))))
148147, 134, 9dssmapfvd 41514 . 2 (𝜑𝐷 = (𝑔 ∈ (𝒫 𝐵m 𝒫 𝐵) ↦ (𝑧 ∈ 𝒫 𝐵 ↦ (𝐵 ∖ (𝑔‘(𝐵𝑧))))))
149132, 136, 1483eqtr4d 2788 1 (𝜑𝐷 = 𝐷)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  wcel 2108  wral 3063  Vcvv 3422  cdif 3880  cun 3881  wss 3883  𝒫 cpw 4530  cmpt 5153  ccnv 5579   Fn wfn 6413  wf 6414  cfv 6418  (class class class)co 7255  m cmap 8573
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-ov 7258  df-oprab 7259  df-mpo 7260  df-1st 7804  df-2nd 7805  df-map 8575
This theorem is referenced by:  dssmapf1od  41518  dssmap2d  41519  ntrclsnvobr  41551  clsneicnv  41604  neicvgnvo  41614  dssmapclsntr  41628
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