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Theorem regr1lem 21744
 Description: Lemma for regr1 21755. (Contributed by Mario Carneiro, 25-Aug-2015.)
Hypotheses
Ref Expression
kqval.2 𝐹 = (𝑥𝑋 ↦ {𝑦𝐽𝑥𝑦})
regr1lem.2 (𝜑𝐽 ∈ (TopOn‘𝑋))
regr1lem.3 (𝜑𝐽 ∈ Reg)
regr1lem.4 (𝜑𝐴𝑋)
regr1lem.5 (𝜑𝐵𝑋)
regr1lem.6 (𝜑𝑈𝐽)
regr1lem.7 (𝜑 → ¬ ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅))
Assertion
Ref Expression
regr1lem (𝜑 → (𝐴𝑈𝐵𝑈))
Distinct variable groups:   𝑚,𝑛,𝑥,𝑦,𝐴   𝐵,𝑚,𝑛,𝑥,𝑦   𝑚,𝐽,𝑛,𝑥,𝑦   𝑚,𝐹,𝑛   𝑚,𝑋,𝑛,𝑥,𝑦
Allowed substitution hints:   𝜑(𝑥,𝑦,𝑚,𝑛)   𝑈(𝑥,𝑦,𝑚,𝑛)   𝐹(𝑥,𝑦)

Proof of Theorem regr1lem
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 regr1lem.3 . . . . 5 (𝜑𝐽 ∈ Reg)
21adantr 472 . . . 4 ((𝜑𝐴𝑈) → 𝐽 ∈ Reg)
3 regr1lem.6 . . . . 5 (𝜑𝑈𝐽)
43adantr 472 . . . 4 ((𝜑𝐴𝑈) → 𝑈𝐽)
5 simpr 479 . . . 4 ((𝜑𝐴𝑈) → 𝐴𝑈)
6 regsep 21340 . . . 4 ((𝐽 ∈ Reg ∧ 𝑈𝐽𝐴𝑈) → ∃𝑧𝐽 (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))
72, 4, 5, 6syl3anc 1477 . . 3 ((𝜑𝐴𝑈) → ∃𝑧𝐽 (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))
8 regr1lem.7 . . . . 5 (𝜑 → ¬ ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅))
98ad2antrr 764 . . . 4 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → ¬ ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅))
10 regr1lem.2 . . . . . . . 8 (𝜑𝐽 ∈ (TopOn‘𝑋))
1110ad3antrrr 768 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐽 ∈ (TopOn‘𝑋))
12 simplrl 819 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝑧𝐽)
13 kqval.2 . . . . . . . 8 𝐹 = (𝑥𝑋 ↦ {𝑦𝐽𝑥𝑦})
1413kqopn 21739 . . . . . . 7 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑧𝐽) → (𝐹𝑧) ∈ (KQ‘𝐽))
1511, 12, 14syl2anc 696 . . . . . 6 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐹𝑧) ∈ (KQ‘𝐽))
16 toponuni 20921 . . . . . . . . . 10 (𝐽 ∈ (TopOn‘𝑋) → 𝑋 = 𝐽)
1711, 16syl 17 . . . . . . . . 9 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝑋 = 𝐽)
1817difeq1d 3870 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝑋 ∖ ((cls‘𝐽)‘𝑧)) = ( 𝐽 ∖ ((cls‘𝐽)‘𝑧)))
19 topontop 20920 . . . . . . . . . . 11 (𝐽 ∈ (TopOn‘𝑋) → 𝐽 ∈ Top)
2011, 19syl 17 . . . . . . . . . 10 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐽 ∈ Top)
21 elssuni 4619 . . . . . . . . . . 11 (𝑧𝐽𝑧 𝐽)
2212, 21syl 17 . . . . . . . . . 10 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝑧 𝐽)
23 eqid 2760 . . . . . . . . . . 11 𝐽 = 𝐽
2423clscld 21053 . . . . . . . . . 10 ((𝐽 ∈ Top ∧ 𝑧 𝐽) → ((cls‘𝐽)‘𝑧) ∈ (Clsd‘𝐽))
2520, 22, 24syl2anc 696 . . . . . . . . 9 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ((cls‘𝐽)‘𝑧) ∈ (Clsd‘𝐽))
2623cldopn 21037 . . . . . . . . 9 (((cls‘𝐽)‘𝑧) ∈ (Clsd‘𝐽) → ( 𝐽 ∖ ((cls‘𝐽)‘𝑧)) ∈ 𝐽)
2725, 26syl 17 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ( 𝐽 ∖ ((cls‘𝐽)‘𝑧)) ∈ 𝐽)
2818, 27eqeltrd 2839 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ∈ 𝐽)
2913kqopn 21739 . . . . . . 7 ((𝐽 ∈ (TopOn‘𝑋) ∧ (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ∈ 𝐽) → (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ∈ (KQ‘𝐽))
3011, 28, 29syl2anc 696 . . . . . 6 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ∈ (KQ‘𝐽))
31 simprrl 823 . . . . . . . 8 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → 𝐴𝑧)
3231adantr 472 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐴𝑧)
33 regr1lem.4 . . . . . . . . 9 (𝜑𝐴𝑋)
3433ad3antrrr 768 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐴𝑋)
3513kqfvima 21735 . . . . . . . 8 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑧𝐽𝐴𝑋) → (𝐴𝑧 ↔ (𝐹𝐴) ∈ (𝐹𝑧)))
3611, 12, 34, 35syl3anc 1477 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐴𝑧 ↔ (𝐹𝐴) ∈ (𝐹𝑧)))
3732, 36mpbid 222 . . . . . 6 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐹𝐴) ∈ (𝐹𝑧))
38 regr1lem.5 . . . . . . . . 9 (𝜑𝐵𝑋)
3938ad3antrrr 768 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐵𝑋)
40 simprrr 824 . . . . . . . . . 10 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → ((cls‘𝐽)‘𝑧) ⊆ 𝑈)
4140sseld 3743 . . . . . . . . 9 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → (𝐵 ∈ ((cls‘𝐽)‘𝑧) → 𝐵𝑈))
4241con3dimp 456 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ¬ 𝐵 ∈ ((cls‘𝐽)‘𝑧))
4339, 42eldifd 3726 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝐵 ∈ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))
4413kqfvima 21735 . . . . . . . 8 ((𝐽 ∈ (TopOn‘𝑋) ∧ (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ∈ 𝐽𝐵𝑋) → (𝐵 ∈ (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ↔ (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))))
4511, 28, 39, 44syl3anc 1477 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐵 ∈ (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ↔ (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))))
4643, 45mpbid 222 . . . . . 6 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))))
4723sscls 21062 . . . . . . . . . 10 ((𝐽 ∈ Top ∧ 𝑧 𝐽) → 𝑧 ⊆ ((cls‘𝐽)‘𝑧))
4820, 22, 47syl2anc 696 . . . . . . . . 9 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → 𝑧 ⊆ ((cls‘𝐽)‘𝑧))
4948sscond 3890 . . . . . . . 8 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → (𝑋 ∖ ((cls‘𝐽)‘𝑧)) ⊆ (𝑋𝑧))
50 imass2 5659 . . . . . . . 8 ((𝑋 ∖ ((cls‘𝐽)‘𝑧)) ⊆ (𝑋𝑧) → (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ⊆ (𝐹 “ (𝑋𝑧)))
51 sslin 3982 . . . . . . . 8 ((𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ⊆ (𝐹 “ (𝑋𝑧)) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) ⊆ ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))))
5249, 50, 513syl 18 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) ⊆ ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))))
5313kqdisj 21737 . . . . . . . 8 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑧𝐽) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))) = ∅)
5411, 12, 53syl2anc 696 . . . . . . 7 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))) = ∅)
55 sseq0 4118 . . . . . . 7 ((((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) ⊆ ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))) ∧ ((𝐹𝑧) ∩ (𝐹 “ (𝑋𝑧))) = ∅) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) = ∅)
5652, 54, 55syl2anc 696 . . . . . 6 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) = ∅)
57 eleq2 2828 . . . . . . . 8 (𝑚 = (𝐹𝑧) → ((𝐹𝐴) ∈ 𝑚 ↔ (𝐹𝐴) ∈ (𝐹𝑧)))
58 ineq1 3950 . . . . . . . . 9 (𝑚 = (𝐹𝑧) → (𝑚𝑛) = ((𝐹𝑧) ∩ 𝑛))
5958eqeq1d 2762 . . . . . . . 8 (𝑚 = (𝐹𝑧) → ((𝑚𝑛) = ∅ ↔ ((𝐹𝑧) ∩ 𝑛) = ∅))
6057, 593anbi13d 1550 . . . . . . 7 (𝑚 = (𝐹𝑧) → (((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅) ↔ ((𝐹𝐴) ∈ (𝐹𝑧) ∧ (𝐹𝐵) ∈ 𝑛 ∧ ((𝐹𝑧) ∩ 𝑛) = ∅)))
61 eleq2 2828 . . . . . . . 8 (𝑛 = (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) → ((𝐹𝐵) ∈ 𝑛 ↔ (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))))
62 ineq2 3951 . . . . . . . . 9 (𝑛 = (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) → ((𝐹𝑧) ∩ 𝑛) = ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))))
6362eqeq1d 2762 . . . . . . . 8 (𝑛 = (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) → (((𝐹𝑧) ∩ 𝑛) = ∅ ↔ ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) = ∅))
6461, 633anbi23d 1551 . . . . . . 7 (𝑛 = (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) → (((𝐹𝐴) ∈ (𝐹𝑧) ∧ (𝐹𝐵) ∈ 𝑛 ∧ ((𝐹𝑧) ∩ 𝑛) = ∅) ↔ ((𝐹𝐴) ∈ (𝐹𝑧) ∧ (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ∧ ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) = ∅)))
6560, 64rspc2ev 3463 . . . . . 6 (((𝐹𝑧) ∈ (KQ‘𝐽) ∧ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ∈ (KQ‘𝐽) ∧ ((𝐹𝐴) ∈ (𝐹𝑧) ∧ (𝐹𝐵) ∈ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧))) ∧ ((𝐹𝑧) ∩ (𝐹 “ (𝑋 ∖ ((cls‘𝐽)‘𝑧)))) = ∅)) → ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅))
6615, 30, 37, 46, 56, 65syl113anc 1489 . . . . 5 ((((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) ∧ ¬ 𝐵𝑈) → ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅))
6766ex 449 . . . 4 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → (¬ 𝐵𝑈 → ∃𝑚 ∈ (KQ‘𝐽)∃𝑛 ∈ (KQ‘𝐽)((𝐹𝐴) ∈ 𝑚 ∧ (𝐹𝐵) ∈ 𝑛 ∧ (𝑚𝑛) = ∅)))
689, 67mt3d 140 . . 3 (((𝜑𝐴𝑈) ∧ (𝑧𝐽 ∧ (𝐴𝑧 ∧ ((cls‘𝐽)‘𝑧) ⊆ 𝑈))) → 𝐵𝑈)
697, 68rexlimddv 3173 . 2 ((𝜑𝐴𝑈) → 𝐵𝑈)
7069ex 449 1 (𝜑 → (𝐴𝑈𝐵𝑈))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1072   = wceq 1632   ∈ wcel 2139  ∃wrex 3051  {crab 3054   ∖ cdif 3712   ∩ cin 3714   ⊆ wss 3715  ∅c0 4058  ∪ cuni 4588   ↦ cmpt 4881   “ cima 5269  ‘cfv 6049  Topctop 20900  TopOnctopon 20917  Clsdccld 21022  clsccl 21024  Regcreg 21315  KQckq 21698 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-rep 4923  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7114 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-reu 3057  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-int 4628  df-iun 4674  df-iin 4675  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-f1 6054  df-fo 6055  df-f1o 6056  df-fv 6057  df-ov 6816  df-oprab 6817  df-mpt2 6818  df-qtop 16369  df-top 20901  df-topon 20918  df-cld 21025  df-cls 21027  df-reg 21322  df-kq 21699 This theorem is referenced by:  regr1lem2  21745
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