ntrclsk13 - Mathbox for Richard Penner

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Theorem ntrclsk13 44652

Description: The interior of the intersection of any pair is equal to the intersection of the interiors if and only if the closure of the unions of any pair is equal to the union of closures. (Contributed by RP, 19-Jun-2021.)

**Hypotheses**
Ref	Expression
ntrcls.o	⊢ 𝑂 = (𝑖 ∈ V ↦ (𝑘 ∈ (𝒫 𝑖 ↑_m 𝒫 𝑖) ↦ (𝑗 ∈ 𝒫 𝑖 ↦ (𝑖 ∖ (𝑘‘(𝑖 ∖ 𝑗))))))
ntrcls.d	⊢ 𝐷 = (𝑂‘𝐵)
ntrcls.r	⊢ (𝜑 → 𝐼𝐷𝐾)

**Assertion**
Ref	Expression
ntrclsk13	⊢ (𝜑 → (∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐼‘(𝑠 ∩ 𝑡)) = ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) ↔ ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))

Distinct variable groups: 𝐵,𝑠,𝑡,𝑖,𝑗,𝑘 𝐼,𝑠,𝑡,𝑖,𝑗,𝑘 𝜑,𝑠,𝑡,𝑖,𝑗,𝑘 Allowed substitution hints: 𝐷(𝑡,𝑖,𝑗,𝑘,𝑠) 𝐾(𝑡,𝑖,𝑗,𝑘,𝑠) 𝑂(𝑡,𝑖,𝑗,𝑘,𝑠)

Proof of Theorem ntrclsk13 Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ineq1 4166	. . . . 5 ⊢ (𝑠 = 𝑎 → (𝑠 ∩ 𝑡) = (𝑎 ∩ 𝑡))
2	1	fveq2d 6871	. . . 4 ⊢ (𝑠 = 𝑎 → (𝐼‘(𝑠 ∩ 𝑡)) = (𝐼‘(𝑎 ∩ 𝑡)))
3		fveq2 6867	. . . . 5 ⊢ (𝑠 = 𝑎 → (𝐼‘𝑠) = (𝐼‘𝑎))
4	3	ineq1d 4172	. . . 4 ⊢ (𝑠 = 𝑎 → ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡)))
5	2, 4	eqeq12d 2779	. . 3 ⊢ (𝑠 = 𝑎 → ((𝐼‘(𝑠 ∩ 𝑡)) = ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) ↔ (𝐼‘(𝑎 ∩ 𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡))))
6		ineq2 4167	. . . . 5 ⊢ (𝑡 = 𝑏 → (𝑎 ∩ 𝑡) = (𝑎 ∩ 𝑏))
7	6	fveq2d 6871	. . . 4 ⊢ (𝑡 = 𝑏 → (𝐼‘(𝑎 ∩ 𝑡)) = (𝐼‘(𝑎 ∩ 𝑏)))
8		fveq2 6867	. . . . 5 ⊢ (𝑡 = 𝑏 → (𝐼‘𝑡) = (𝐼‘𝑏))
9	8	ineq2d 4173	. . . 4 ⊢ (𝑡 = 𝑏 → ((𝐼‘𝑎) ∩ (𝐼‘𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)))
10	7, 9	eqeq12d 2779	. . 3 ⊢ (𝑡 = 𝑏 → ((𝐼‘(𝑎 ∩ 𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡)) ↔ (𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏))))
11	5, 10	cbvral2vw 3245	. 2 ⊢ (∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐼‘(𝑠 ∩ 𝑡)) = ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) ↔ ∀𝑎 ∈ 𝒫 𝐵∀𝑏 ∈ 𝒫 𝐵(𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)))
12		ntrcls.d	. . . . . 6 ⊢ 𝐷 = (𝑂‘𝐵)
13		ntrcls.r	. . . . . 6 ⊢ (𝜑 → 𝐼𝐷𝐾)
14	12, 13	ntrclsbex 44615	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ V)
15		difssd 4091	. . . . 5 ⊢ (𝜑 → (𝐵 ∖ 𝑠) ⊆ 𝐵)
16	14, 15	sselpwd 5285	. . . 4 ⊢ (𝜑 → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
17	16	adantr 484	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
18		elpwi 4563	. . . 4 ⊢ (𝑎 ∈ 𝒫 𝐵 → 𝑎 ⊆ 𝐵)
19	14	adantr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → 𝐵 ∈ V)
20		difssd 4091	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ 𝑎) ⊆ 𝐵)
21	19, 20	sselpwd 5285	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ 𝑎) ∈ 𝒫 𝐵)
22		difeq2 4075	. . . . . . . 8 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝐵 ∖ 𝑠) = (𝐵 ∖ (𝐵 ∖ 𝑎)))
23	22	eqeq2d 2774	. . . . . . 7 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝑎 = (𝐵 ∖ 𝑠) ↔ 𝑎 = (𝐵 ∖ (𝐵 ∖ 𝑎))))
24		eqcom 2770	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ (𝐵 ∖ 𝑎)) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
25	23, 24	bitrdi 289	. . . . . 6 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝑎 = (𝐵 ∖ 𝑠) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎))
26	25	adantl 485	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ⊆ 𝐵) ∧ 𝑠 = (𝐵 ∖ 𝑎)) → (𝑎 = (𝐵 ∖ 𝑠) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎))
27		dfss4 4222	. . . . . 6 ⊢ (𝑎 ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
28	27	bilani 508	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
29	21, 26, 28	rspcedvd 3584	. . . 4 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → ∃𝑠 ∈ 𝒫 𝐵𝑎 = (𝐵 ∖ 𝑠))
30	18, 29	sylan2 602	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 𝐵) → ∃𝑠 ∈ 𝒫 𝐵𝑎 = (𝐵 ∖ 𝑠))
31		ineq1 4166	. . . . . . . 8 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝑎 ∩ 𝑏) = ((𝐵 ∖ 𝑠) ∩ 𝑏))
32	31	fveq2d 6871	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝐼‘(𝑎 ∩ 𝑏)) = (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)))
33		fveq2 6867	. . . . . . . 8 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝐼‘𝑎) = (𝐼‘(𝐵 ∖ 𝑠)))
34	33	ineq1d 4172	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)))
35	32, 34	eqeq12d 2779	. . . . . 6 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → ((𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏))))
36	35	ralbidv 3186	. . . . 5 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (∀𝑏 ∈ 𝒫 𝐵(𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ ∀𝑏 ∈ 𝒫 𝐵(𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏))))
37	36	3ad2ant3 1149	. . . 4 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵 ∧ 𝑎 = (𝐵 ∖ 𝑠)) → (∀𝑏 ∈ 𝒫 𝐵(𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ ∀𝑏 ∈ 𝒫 𝐵(𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏))))
38		difssd 4091	. . . . . . . 8 ⊢ (𝜑 → (𝐵 ∖ 𝑡) ⊆ 𝐵)
39	14, 38	sselpwd 5285	. . . . . . 7 ⊢ (𝜑 → (𝐵 ∖ 𝑡) ∈ 𝒫 𝐵)
40	39	ad2antrr 736	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ 𝑡) ∈ 𝒫 𝐵)
41		simpll 776	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → 𝜑)
42		elpwi 4563	. . . . . . . 8 ⊢ (𝑏 ∈ 𝒫 𝐵 → 𝑏 ⊆ 𝐵)
43	42	adantl 485	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → 𝑏 ⊆ 𝐵)
44		difssd 4091	. . . . . . . . . 10 ⊢ (𝜑 → (𝐵 ∖ 𝑏) ⊆ 𝐵)
45	14, 44	sselpwd 5285	. . . . . . . . 9 ⊢ (𝜑 → (𝐵 ∖ 𝑏) ∈ 𝒫 𝐵)
46	45	adantr 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → (𝐵 ∖ 𝑏) ∈ 𝒫 𝐵)
47		difeq2 4075	. . . . . . . . . . 11 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝐵 ∖ 𝑡) = (𝐵 ∖ (𝐵 ∖ 𝑏)))
48	47	eqeq2d 2774	. . . . . . . . . 10 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝑏 = (𝐵 ∖ 𝑡) ↔ 𝑏 = (𝐵 ∖ (𝐵 ∖ 𝑏))))
49		eqcom 2770	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ (𝐵 ∖ 𝑏)) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
50	48, 49	bitrdi 289	. . . . . . . . 9 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝑏 = (𝐵 ∖ 𝑡) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏))
51	50	adantl 485	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐵) ∧ 𝑡 = (𝐵 ∖ 𝑏)) → (𝑏 = (𝐵 ∖ 𝑡) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏))
52		dfss4 4222	. . . . . . . . 9 ⊢ (𝑏 ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
53	52	bilani 508	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
54	46, 51, 53	rspcedvd 3584	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → ∃𝑡 ∈ 𝒫 𝐵𝑏 = (𝐵 ∖ 𝑡))
55	41, 43, 54	syl2anc 593	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → ∃𝑡 ∈ 𝒫 𝐵𝑏 = (𝐵 ∖ 𝑡))
56		ineq2 4167	. . . . . . . . . . 11 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐵 ∖ 𝑠) ∩ 𝑏) = ((𝐵 ∖ 𝑠) ∩ (𝐵 ∖ 𝑡)))
57		difundi 4243	. . . . . . . . . . 11 ⊢ (𝐵 ∖ (𝑠 ∪ 𝑡)) = ((𝐵 ∖ 𝑠) ∩ (𝐵 ∖ 𝑡))
58	56, 57	eqtr4di 2816	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐵 ∖ 𝑠) ∩ 𝑏) = (𝐵 ∖ (𝑠 ∪ 𝑡)))
59	58	fveq2d 6871	. . . . . . . . 9 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))))
60		fveq2 6867	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → (𝐼‘𝑏) = (𝐼‘(𝐵 ∖ 𝑡)))
61	60	ineq2d 4173	. . . . . . . . 9 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))))
62	59, 61	eqeq12d 2779	. . . . . . . 8 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))))
63	62	3ad2ant3 1149	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → ((𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))))
64		simp1l 1212	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝜑)
65	64, 14	jccir 529	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → (𝜑 ∧ 𝐵 ∈ V))
66		simp1r 1213	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝑠 ∈ 𝒫 𝐵)
67		simp2 1151	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝑡 ∈ 𝒫 𝐵)
68		ntrcls.o	. . . . . . . . . . . . . 14 ⊢ 𝑂 = (𝑖 ∈ V ↦ (𝑘 ∈ (𝒫 𝑖 ↑_m 𝒫 𝑖) ↦ (𝑗 ∈ 𝒫 𝑖 ↦ (𝑖 ∖ (𝑘‘(𝑖 ∖ 𝑗))))))
69	68, 12, 13	ntrclsiex 44634	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
70		elmapi 8830	. . . . . . . . . . . . 13 ⊢ (𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵) → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
71	69, 70	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
72	71	anim1i 624	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐵 ∈ V) → (𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V))
73	72	adantr 484	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V))
74		simpl 486	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
75		simpr 488	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → 𝐵 ∈ V)
76		difssd 4091	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ (𝑠 ∪ 𝑡)) ⊆ 𝐵)
77	75, 76	sselpwd 5285	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ (𝑠 ∪ 𝑡)) ∈ 𝒫 𝐵)
78	74, 77	ffvelcdmd 7066	. . . . . . . . . . . 12 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ∈ 𝒫 𝐵)
79	78	elpwid 4565	. . . . . . . . . . 11 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ⊆ 𝐵)
80		difssd 4091	. . . . . . . . . . . . . . 15 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ 𝑠) ⊆ 𝐵)
81	75, 80	sselpwd 5285	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
82	74, 81	ffvelcdmd 7066	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ 𝑠)) ∈ 𝒫 𝐵)
83	82	elpwid 4565	. . . . . . . . . . . 12 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ 𝑠)) ⊆ 𝐵)
84		ssinss1 4198	. . . . . . . . . . . 12 ⊢ ((𝐼‘(𝐵 ∖ 𝑠)) ⊆ 𝐵 → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵)
85	83, 84	syl 17	. . . . . . . . . . 11 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵)
86	79, 85	jca 519	. . . . . . . . . 10 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ⊆ 𝐵 ∧ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵))
87		rcompleq 4258	. . . . . . . . . 10 ⊢ (((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ⊆ 𝐵 ∧ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ↔ (𝐵 ∖ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡)))) = (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))))))
88	73, 86, 87	3syl 18	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ↔ (𝐵 ∖ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡)))) = (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))))))
89		simplr 778	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝐵 ∈ V)
90	69	ad2antrr 736	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
91		eqid 2763	. . . . . . . . . . 11 ⊢ (𝐷‘𝐼) = (𝐷‘𝐼)
92		simprl 780	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑠 ∈ 𝒫 𝐵)
93	92	elpwid 4565	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑠 ⊆ 𝐵)
94		simprr 782	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑡 ∈ 𝒫 𝐵)
95	94	elpwid 4565	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑡 ⊆ 𝐵)
96	93, 95	unssd 4145	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝑠 ∪ 𝑡) ⊆ 𝐵)
97	89, 96	sselpwd 5285	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝑠 ∪ 𝑡) ∈ 𝒫 𝐵)
98		eqid 2763	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡))
99	68, 12, 89, 90, 91, 97, 98	dssmapfv3d 44600	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (𝐵 ∖ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡)))))
100		simpl 486	. . . . . . . . . . . . 13 ⊢ ((𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑠 ∈ 𝒫 𝐵)
101		simplr 778	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝐵 ∈ V)
102	69	ad2antrr 736	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
103		simpr 488	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝑠 ∈ 𝒫 𝐵)
104		eqid 2763	. . . . . . . . . . . . . 14 ⊢ ((𝐷‘𝐼)‘𝑠) = ((𝐷‘𝐼)‘𝑠)
105	68, 12, 101, 102, 91, 103, 104	dssmapfv3d 44600	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → ((𝐷‘𝐼)‘𝑠) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))))
106	100, 105	sylan2 602	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘𝑠) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))))
107		simpr 488	. . . . . . . . . . . . 13 ⊢ ((𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑡 ∈ 𝒫 𝐵)
108		simplr 778	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝐵 ∈ V)
109	69	ad2antrr 736	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
110		simpr 488	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑡 ∈ 𝒫 𝐵)
111		eqid 2763	. . . . . . . . . . . . . 14 ⊢ ((𝐷‘𝐼)‘𝑡) = ((𝐷‘𝐼)‘𝑡)
112	68, 12, 108, 109, 91, 110, 111	dssmapfv3d 44600	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → ((𝐷‘𝐼)‘𝑡) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
113	107, 112	sylan2 602	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘𝑡) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
114	106, 113	uneq12d 4123	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = ((𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))) ∪ (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡)))))
115		difindi 4245	. . . . . . . . . . 11 ⊢ (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))) = ((𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))) ∪ (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
116	114, 115	eqtr4di 2816	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))))
117	99, 116	eqeq12d 2779	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) ↔ (𝐵 ∖ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡)))) = (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))))))
118		simpll 776	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝜑)
119	68, 12, 13	ntrclsfv1 44636	. . . . . . . . . 10 ⊢ (𝜑 → (𝐷‘𝐼) = 𝐾)
120		fveq1 6866	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (𝐾‘(𝑠 ∪ 𝑡)))
121		fveq1 6866	. . . . . . . . . . . 12 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘𝑠) = (𝐾‘𝑠))
122		fveq1 6866	. . . . . . . . . . . 12 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘𝑡) = (𝐾‘𝑡))
123	121, 122	uneq12d 4123	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼) = 𝐾 → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡)))
124	120, 123	eqeq12d 2779	. . . . . . . . . 10 ⊢ ((𝐷‘𝐼) = 𝐾 → (((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
125	118, 119, 124	3syl 18	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
126	88, 117, 125	3bitr2d 309	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
127	65, 66, 67, 126	syl12anc 847	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
128	63, 127	bitrd 281	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → ((𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
129	40, 55, 128	ralxfrd2 5370	. . . . 5 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → (∀𝑏 ∈ 𝒫 𝐵(𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ ∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
130	129	3adant3 1146	. . . 4 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵 ∧ 𝑎 = (𝐵 ∖ 𝑠)) → (∀𝑏 ∈ 𝒫 𝐵(𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ ∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
131	37, 130	bitrd 281	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵 ∧ 𝑎 = (𝐵 ∖ 𝑠)) → (∀𝑏 ∈ 𝒫 𝐵(𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ ∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
132	17, 30, 131	ralxfrd2 5370	. 2 ⊢ (𝜑 → (∀𝑎 ∈ 𝒫 𝐵∀𝑏 ∈ 𝒫 𝐵(𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
133	11, 132	bitrid 285	1 ⊢ (𝜑 → (∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐼‘(𝑠 ∩ 𝑡)) = ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) ↔ ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵(𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 ∧ w3a 1099 = wceq 1561 ∈ wcel 2143 ∀wral 3077 ∃wrex 3087 Vcvv 3455 ∖ cdif 3902 ∪ cun 3903 ∩ cin 3904 ⊆ wss 3905 𝒫 cpw 4556 class class class wbr 5101 ↦ cmpt 5182 ⟶wf 6517 ‘cfv 6521 (class class class)co 7396 ↑_m cmap 8808

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7718

This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-id 5543 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-ov 7399 df-oprab 7400 df-mpo 7401 df-1st 7970 df-2nd 7971 df-map 8810

This theorem is referenced by: (None)

W3C validator