ntrclsk13 - Mathbox for Richard Penner

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Theorem ntrclsk13 41663

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 4145	. . . . 5 ⊢ (𝑠 = 𝑎 → (𝑠 ∩ 𝑡) = (𝑎 ∩ 𝑡))
2	1	fveq2d 6775	. . . 4 ⊢ (𝑠 = 𝑎 → (𝐼‘(𝑠 ∩ 𝑡)) = (𝐼‘(𝑎 ∩ 𝑡)))
3		fveq2 6771	. . . . 5 ⊢ (𝑠 = 𝑎 → (𝐼‘𝑠) = (𝐼‘𝑎))
4	3	ineq1d 4151	. . . 4 ⊢ (𝑠 = 𝑎 → ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡)))
5	2, 4	eqeq12d 2756	. . 3 ⊢ (𝑠 = 𝑎 → ((𝐼‘(𝑠 ∩ 𝑡)) = ((𝐼‘𝑠) ∩ (𝐼‘𝑡)) ↔ (𝐼‘(𝑎 ∩ 𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡))))
6		ineq2 4146	. . . . 5 ⊢ (𝑡 = 𝑏 → (𝑎 ∩ 𝑡) = (𝑎 ∩ 𝑏))
7	6	fveq2d 6775	. . . 4 ⊢ (𝑡 = 𝑏 → (𝐼‘(𝑎 ∩ 𝑡)) = (𝐼‘(𝑎 ∩ 𝑏)))
8		fveq2 6771	. . . . 5 ⊢ (𝑡 = 𝑏 → (𝐼‘𝑡) = (𝐼‘𝑏))
9	8	ineq2d 4152	. . . 4 ⊢ (𝑡 = 𝑏 → ((𝐼‘𝑎) ∩ (𝐼‘𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)))
10	7, 9	eqeq12d 2756	. . 3 ⊢ (𝑡 = 𝑏 → ((𝐼‘(𝑎 ∩ 𝑡)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑡)) ↔ (𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏))))
11	5, 10	cbvral2vw 3394	. 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 41626	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ V)
15		difssd 4072	. . . . 5 ⊢ (𝜑 → (𝐵 ∖ 𝑠) ⊆ 𝐵)
16	14, 15	sselpwd 5254	. . . 4 ⊢ (𝜑 → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
17	16	adantr 481	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
18		elpwi 4548	. . . 4 ⊢ (𝑎 ∈ 𝒫 𝐵 → 𝑎 ⊆ 𝐵)
19	14	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → 𝐵 ∈ V)
20		difssd 4072	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ 𝑎) ⊆ 𝐵)
21	19, 20	sselpwd 5254	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ 𝑎) ∈ 𝒫 𝐵)
22		difeq2 4056	. . . . . . . 8 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝐵 ∖ 𝑠) = (𝐵 ∖ (𝐵 ∖ 𝑎)))
23	22	eqeq2d 2751	. . . . . . 7 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝑎 = (𝐵 ∖ 𝑠) ↔ 𝑎 = (𝐵 ∖ (𝐵 ∖ 𝑎))))
24		eqcom 2747	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ (𝐵 ∖ 𝑎)) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
25	23, 24	bitrdi 287	. . . . . 6 ⊢ (𝑠 = (𝐵 ∖ 𝑎) → (𝑎 = (𝐵 ∖ 𝑠) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎))
26	25	adantl 482	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ⊆ 𝐵) ∧ 𝑠 = (𝐵 ∖ 𝑎)) → (𝑎 = (𝐵 ∖ 𝑠) ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎))
27		dfss4 4198	. . . . . . 7 ⊢ (𝑎 ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
28	27	biimpi 215	. . . . . 6 ⊢ (𝑎 ⊆ 𝐵 → (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
29	28	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → (𝐵 ∖ (𝐵 ∖ 𝑎)) = 𝑎)
30	21, 26, 29	rspcedvd 3564	. . . 4 ⊢ ((𝜑 ∧ 𝑎 ⊆ 𝐵) → ∃𝑠 ∈ 𝒫 𝐵𝑎 = (𝐵 ∖ 𝑠))
31	18, 30	sylan2 593	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 𝐵) → ∃𝑠 ∈ 𝒫 𝐵𝑎 = (𝐵 ∖ 𝑠))
32		ineq1 4145	. . . . . . . 8 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝑎 ∩ 𝑏) = ((𝐵 ∖ 𝑠) ∩ 𝑏))
33	32	fveq2d 6775	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝐼‘(𝑎 ∩ 𝑏)) = (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)))
34		fveq2 6771	. . . . . . . 8 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → (𝐼‘𝑎) = (𝐼‘(𝐵 ∖ 𝑠)))
35	34	ineq1d 4151	. . . . . . 7 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)))
36	33, 35	eqeq12d 2756	. . . . . 6 ⊢ (𝑎 = (𝐵 ∖ 𝑠) → ((𝐼‘(𝑎 ∩ 𝑏)) = ((𝐼‘𝑎) ∩ (𝐼‘𝑏)) ↔ (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏))))
37	36	ralbidv 3123	. . . . 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))))
38	37	3ad2ant3 1134	. . . 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))))
39		difssd 4072	. . . . . . . 8 ⊢ (𝜑 → (𝐵 ∖ 𝑡) ⊆ 𝐵)
40	14, 39	sselpwd 5254	. . . . . . 7 ⊢ (𝜑 → (𝐵 ∖ 𝑡) ∈ 𝒫 𝐵)
41	40	ad2antrr 723	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵) → (𝐵 ∖ 𝑡) ∈ 𝒫 𝐵)
42		simpll 764	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → 𝜑)
43		elpwi 4548	. . . . . . . 8 ⊢ (𝑏 ∈ 𝒫 𝐵 → 𝑏 ⊆ 𝐵)
44	43	adantl 482	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → 𝑏 ⊆ 𝐵)
45		difssd 4072	. . . . . . . . . 10 ⊢ (𝜑 → (𝐵 ∖ 𝑏) ⊆ 𝐵)
46	14, 45	sselpwd 5254	. . . . . . . . 9 ⊢ (𝜑 → (𝐵 ∖ 𝑏) ∈ 𝒫 𝐵)
47	46	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → (𝐵 ∖ 𝑏) ∈ 𝒫 𝐵)
48		difeq2 4056	. . . . . . . . . . 11 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝐵 ∖ 𝑡) = (𝐵 ∖ (𝐵 ∖ 𝑏)))
49	48	eqeq2d 2751	. . . . . . . . . 10 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝑏 = (𝐵 ∖ 𝑡) ↔ 𝑏 = (𝐵 ∖ (𝐵 ∖ 𝑏))))
50		eqcom 2747	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ (𝐵 ∖ 𝑏)) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
51	49, 50	bitrdi 287	. . . . . . . . 9 ⊢ (𝑡 = (𝐵 ∖ 𝑏) → (𝑏 = (𝐵 ∖ 𝑡) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏))
52	51	adantl 482	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐵) ∧ 𝑡 = (𝐵 ∖ 𝑏)) → (𝑏 = (𝐵 ∖ 𝑡) ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏))
53		dfss4 4198	. . . . . . . . . 10 ⊢ (𝑏 ⊆ 𝐵 ↔ (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
54	53	biimpi 215	. . . . . . . . 9 ⊢ (𝑏 ⊆ 𝐵 → (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
55	54	adantl 482	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → (𝐵 ∖ (𝐵 ∖ 𝑏)) = 𝑏)
56	47, 52, 55	rspcedvd 3564	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑏 ⊆ 𝐵) → ∃𝑡 ∈ 𝒫 𝐵𝑏 = (𝐵 ∖ 𝑡))
57	42, 44, 56	syl2anc 584	. . . . . 6 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑏 ∈ 𝒫 𝐵) → ∃𝑡 ∈ 𝒫 𝐵𝑏 = (𝐵 ∖ 𝑡))
58		ineq2 4146	. . . . . . . . . . 11 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐵 ∖ 𝑠) ∩ 𝑏) = ((𝐵 ∖ 𝑠) ∩ (𝐵 ∖ 𝑡)))
59		difundi 4219	. . . . . . . . . . 11 ⊢ (𝐵 ∖ (𝑠 ∪ 𝑡)) = ((𝐵 ∖ 𝑠) ∩ (𝐵 ∖ 𝑡))
60	58, 59	eqtr4di 2798	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐵 ∖ 𝑠) ∩ 𝑏) = (𝐵 ∖ (𝑠 ∪ 𝑡)))
61	60	fveq2d 6775	. . . . . . . . 9 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → (𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))))
62		fveq2 6771	. . . . . . . . . 10 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → (𝐼‘𝑏) = (𝐼‘(𝐵 ∖ 𝑡)))
63	62	ineq2d 4152	. . . . . . . . 9 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))))
64	61, 63	eqeq12d 2756	. . . . . . . 8 ⊢ (𝑏 = (𝐵 ∖ 𝑡) → ((𝐼‘((𝐵 ∖ 𝑠) ∩ 𝑏)) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘𝑏)) ↔ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) = ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))))
65	64	3ad2ant3 1134	. . . . . . 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)))))
66		simp1l 1196	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝜑)
67	66, 14	jccir 522	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → (𝜑 ∧ 𝐵 ∈ V))
68		simp1r 1197	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝑠 ∈ 𝒫 𝐵)
69		simp2 1136	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) ∧ 𝑡 ∈ 𝒫 𝐵 ∧ 𝑏 = (𝐵 ∖ 𝑡)) → 𝑡 ∈ 𝒫 𝐵)
70		ntrcls.o	. . . . . . . . . . . . . 14 ⊢ 𝑂 = (𝑖 ∈ V ↦ (𝑘 ∈ (𝒫 𝑖 ↑_m 𝒫 𝑖) ↦ (𝑗 ∈ 𝒫 𝑖 ↦ (𝑖 ∖ (𝑘‘(𝑖 ∖ 𝑗))))))
71	70, 12, 13	ntrclsiex 41645	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
72		elmapi 8629	. . . . . . . . . . . . 13 ⊢ (𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵) → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
73	71, 72	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
74	73	anim1i 615	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐵 ∈ V) → (𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V))
75	74	adantr 481	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V))
76		simpl 483	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → 𝐼:𝒫 𝐵⟶𝒫 𝐵)
77		simpr 485	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → 𝐵 ∈ V)
78		difssd 4072	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ (𝑠 ∪ 𝑡)) ⊆ 𝐵)
79	77, 78	sselpwd 5254	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ (𝑠 ∪ 𝑡)) ∈ 𝒫 𝐵)
80	76, 79	ffvelrnd 6959	. . . . . . . . . . . 12 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ∈ 𝒫 𝐵)
81	80	elpwid 4550	. . . . . . . . . . 11 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ⊆ 𝐵)
82		difssd 4072	. . . . . . . . . . . . . . 15 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ 𝑠) ⊆ 𝐵)
83	77, 82	sselpwd 5254	. . . . . . . . . . . . . 14 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐵 ∖ 𝑠) ∈ 𝒫 𝐵)
84	76, 83	ffvelrnd 6959	. . . . . . . . . . . . 13 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ 𝑠)) ∈ 𝒫 𝐵)
85	84	elpwid 4550	. . . . . . . . . . . 12 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → (𝐼‘(𝐵 ∖ 𝑠)) ⊆ 𝐵)
86		ssinss1 4177	. . . . . . . . . . . 12 ⊢ ((𝐼‘(𝐵 ∖ 𝑠)) ⊆ 𝐵 → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵)
87	85, 86	syl 17	. . . . . . . . . . 11 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵)
88	81, 87	jca 512	. . . . . . . . . 10 ⊢ ((𝐼:𝒫 𝐵⟶𝒫 𝐵 ∧ 𝐵 ∈ V) → ((𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡))) ⊆ 𝐵 ∧ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡))) ⊆ 𝐵))
89		rcompleq 4235	. . . . . . . . . 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))))))
90	75, 88, 89	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))))))
91		simplr 766	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝐵 ∈ V)
92	71	ad2antrr 723	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
93		eqid 2740	. . . . . . . . . . 11 ⊢ (𝐷‘𝐼) = (𝐷‘𝐼)
94		simprl 768	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑠 ∈ 𝒫 𝐵)
95	94	elpwid 4550	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑠 ⊆ 𝐵)
96		simprr 770	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑡 ∈ 𝒫 𝐵)
97	96	elpwid 4550	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝑡 ⊆ 𝐵)
98	95, 97	unssd 4125	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝑠 ∪ 𝑡) ⊆ 𝐵)
99	91, 98	sselpwd 5254	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (𝑠 ∪ 𝑡) ∈ 𝒫 𝐵)
100		eqid 2740	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡))
101	70, 12, 91, 92, 93, 99, 100	dssmapfv3d 41609	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (𝐵 ∖ (𝐼‘(𝐵 ∖ (𝑠 ∪ 𝑡)))))
102		simpl 483	. . . . . . . . . . . . 13 ⊢ ((𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑠 ∈ 𝒫 𝐵)
103		simplr 766	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝐵 ∈ V)
104	71	ad2antrr 723	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
105		simpr 485	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → 𝑠 ∈ 𝒫 𝐵)
106		eqid 2740	. . . . . . . . . . . . . 14 ⊢ ((𝐷‘𝐼)‘𝑠) = ((𝐷‘𝐼)‘𝑠)
107	70, 12, 103, 104, 93, 105, 106	dssmapfv3d 41609	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑠 ∈ 𝒫 𝐵) → ((𝐷‘𝐼)‘𝑠) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))))
108	102, 107	sylan2 593	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘𝑠) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))))
109		simpr 485	. . . . . . . . . . . . 13 ⊢ ((𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑡 ∈ 𝒫 𝐵)
110		simplr 766	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝐵 ∈ V)
111	71	ad2antrr 723	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝐼 ∈ (𝒫 𝐵 ↑_m 𝒫 𝐵))
112		simpr 485	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → 𝑡 ∈ 𝒫 𝐵)
113		eqid 2740	. . . . . . . . . . . . . 14 ⊢ ((𝐷‘𝐼)‘𝑡) = ((𝐷‘𝐼)‘𝑡)
114	70, 12, 110, 111, 93, 112, 113	dssmapfv3d 41609	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ 𝑡 ∈ 𝒫 𝐵) → ((𝐷‘𝐼)‘𝑡) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
115	109, 114	sylan2 593	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → ((𝐷‘𝐼)‘𝑡) = (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
116	108, 115	uneq12d 4103	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = ((𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))) ∪ (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡)))))
117		difindi 4221	. . . . . . . . . . 11 ⊢ (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))) = ((𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑠))) ∪ (𝐵 ∖ (𝐼‘(𝐵 ∖ 𝑡))))
118	116, 117	eqtr4di 2798	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = (𝐵 ∖ ((𝐼‘(𝐵 ∖ 𝑠)) ∩ (𝐼‘(𝐵 ∖ 𝑡)))))
119	101, 118	eqeq12d 2756	. . . . . . . . 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))))))
120		simpll 764	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝐵 ∈ V) ∧ (𝑠 ∈ 𝒫 𝐵 ∧ 𝑡 ∈ 𝒫 𝐵)) → 𝜑)
121	70, 12, 13	ntrclsfv1 41647	. . . . . . . . . 10 ⊢ (𝜑 → (𝐷‘𝐼) = 𝐾)
122		fveq1 6770	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (𝐾‘(𝑠 ∪ 𝑡)))
123		fveq1 6770	. . . . . . . . . . . 12 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘𝑠) = (𝐾‘𝑠))
124		fveq1 6770	. . . . . . . . . . . 12 ⊢ ((𝐷‘𝐼) = 𝐾 → ((𝐷‘𝐼)‘𝑡) = (𝐾‘𝑡))
125	123, 124	uneq12d 4103	. . . . . . . . . . 11 ⊢ ((𝐷‘𝐼) = 𝐾 → (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡)))
126	122, 125	eqeq12d 2756	. . . . . . . . . 10 ⊢ ((𝐷‘𝐼) = 𝐾 → (((𝐷‘𝐼)‘(𝑠 ∪ 𝑡)) = (((𝐷‘𝐼)‘𝑠) ∪ ((𝐷‘𝐼)‘𝑡)) ↔ (𝐾‘(𝑠 ∪ 𝑡)) = ((𝐾‘𝑠) ∪ (𝐾‘𝑡))))
127	120, 121, 126	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))))
128	90, 119, 127	3bitr2d 307	. . . . . . . 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))))
129	67, 68, 69, 128	syl12anc 834	. . . . . . 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))))
130	65, 129	bitrd 278	. . . . . 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))))
131	41, 57, 130	ralxfrd2 5339	. . . . 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))))
132	131	3adant3 1131	. . . 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))))
133	38, 132	bitrd 278	. . 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))))
134	17, 31, 133	ralxfrd2 5339	. 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))))
135	11, 134	syl5bb 283	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 205 ∧ wa 396 ∧ w3a 1086 = wceq 1542 ∈ wcel 2110 ∀wral 3066 ∃wrex 3067 Vcvv 3431 ∖ cdif 3889 ∪ cun 3890 ∩ cin 3891 ⊆ wss 3892 𝒫 cpw 4539 class class class wbr 5079 ↦ cmpt 5162 ⟶wf 6428 ‘cfv 6432 (class class class)co 7272 ↑_m cmap 8607

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-rep 5214 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7583

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-ral 3071 df-rex 3072 df-reu 3073 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-id 5490 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-ov 7275 df-oprab 7276 df-mpo 7277 df-1st 7825 df-2nd 7826 df-map 8609

This theorem is referenced by: (None)

W3C validator