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Theorem projlem3 10821
Description: Part of Lemma 3.6 of [Beran] p. 100, bottom inequality. Used by projlem6 10824.
Hypotheses
Ref Expression
projlem3.1 |- R e. RR
projlem3.2 |- D e. NN
projlem3.3 |- G e. NN
Assertion
Ref Expression
projlem3 |- (((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2))) - (4 x. (R^2))) <_ (((4 x. R) + 2) x. ((1 / D) + (1 / G)))

Proof of Theorem projlem3
StepHypRef Expression
1 2cn 7164 . . . . . 6 |- 2 e. CC
2 projlem3.1 . . . . . . . . 9 |- R e. RR
3 projlem3.2 . . . . . . . . . . 11 |- D e. NN
43nnrei 7114 . . . . . . . . . 10 |- D e. RR
53nnne0i 7134 . . . . . . . . . 10 |- D =/= 0
64, 5rereccli 6979 . . . . . . . . 9 |- (1 / D) e. RR
72, 6readdcli 6487 . . . . . . . 8 |- (R + (1 / D)) e. RR
87resqcli 7868 . . . . . . 7 |- ((R + (1 / D))^2) e. RR
98recni 6467 . . . . . 6 |- ((R + (1 / D))^2) e. CC
10 projlem3.3 . . . . . . . . . . 11 |- G e. NN
1110nnrei 7114 . . . . . . . . . 10 |- G e. RR
1210nnne0i 7134 . . . . . . . . . 10 |- G =/= 0
1311, 12rereccli 6979 . . . . . . . . 9 |- (1 / G) e. RR
142, 13readdcli 6487 . . . . . . . 8 |- (R + (1 / G)) e. RR
1514resqcli 7868 . . . . . . 7 |- ((R + (1 / G))^2) e. RR
1615recni 6467 . . . . . 6 |- ((R + (1 / G))^2) e. CC
171, 9, 16adddii 6479 . . . . 5 |- (2 x. (((R + (1 / D))^2) + ((R + (1 / G))^2))) = ((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2)))
182recni 6467 . . . . . . . . . 10 |- R e. CC
196recni 6467 . . . . . . . . . 10 |- (1 / D) e. CC
2018, 19binom2i 7890 . . . . . . . . 9 |- ((R + (1 / D))^2) = (((R^2) + (2 x. (R x. (1 / D)))) + ((1 / D)^2))
2118sqcli 7860 . . . . . . . . . 10 |- (R^2) e. CC
2218, 19mulcli 6474 . . . . . . . . . . 11 |- (R x. (1 / D)) e. CC
231, 22mulcli 6474 . . . . . . . . . 10 |- (2 x. (R x. (1 / D))) e. CC
2419sqcli 7860 . . . . . . . . . 10 |- ((1 / D)^2) e. CC
2521, 23, 24addassi 6477 . . . . . . . . 9 |- (((R^2) + (2 x. (R x. (1 / D)))) + ((1 / D)^2)) = ((R^2) + ((2 x. (R x. (1 / D))) + ((1 / D)^2)))
2620, 25eqtri 1908 . . . . . . . 8 |- ((R + (1 / D))^2) = ((R^2) + ((2 x. (R x. (1 / D))) + ((1 / D)^2)))
2713recni 6467 . . . . . . . . . 10 |- (1 / G) e. CC
2818, 27binom2i 7890 . . . . . . . . 9 |- ((R + (1 / G))^2) = (((R^2) + (2 x. (R x. (1 / G)))) + ((1 / G)^2))
2918, 27mulcli 6474 . . . . . . . . . . 11 |- (R x. (1 / G)) e. CC
301, 29mulcli 6474 . . . . . . . . . 10 |- (2 x. (R x. (1 / G))) e. CC
3127sqcli 7860 . . . . . . . . . 10 |- ((1 / G)^2) e. CC
3221, 30, 31addassi 6477 . . . . . . . . 9 |- (((R^2) + (2 x. (R x. (1 / G)))) + ((1 / G)^2)) = ((R^2) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))
3328, 32eqtri 1908 . . . . . . . 8 |- ((R + (1 / G))^2) = ((R^2) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))
3426, 33opreq12i 4894 . . . . . . 7 |- (((R + (1 / D))^2) + ((R + (1 / G))^2)) = (((R^2) + ((2 x. (R x. (1 / D))) + ((1 / D)^2))) + ((R^2) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))))
3523, 24addcli 6473 . . . . . . . 8 |- ((2 x. (R x. (1 / D))) + ((1 / D)^2)) e. CC
3630, 31addcli 6473 . . . . . . . 8 |- ((2 x. (R x. (1 / G))) + ((1 / G)^2)) e. CC
3721, 35, 21, 36add4i 6496 . . . . . . 7 |- (((R^2) + ((2 x. (R x. (1 / D))) + ((1 / D)^2))) + ((R^2) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) = (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))))
3834, 37eqtri 1908 . . . . . 6 |- (((R + (1 / D))^2) + ((R + (1 / G))^2)) = (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))))
3938opreq2i 4893 . . . . 5 |- (2 x. (((R + (1 / D))^2) + ((R + (1 / G))^2))) = (2 x. (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))))
4017, 39eqtr3i 1910 . . . 4 |- ((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2))) = (2 x. (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))))
411, 1, 21mulassi 6478 . . . . 5 |- ((2 x. 2) x. (R^2)) = (2 x. (2 x. (R^2)))
42 2t2e4 7206 . . . . . 6 |- (2 x. 2) = 4
4342opreq1i 4892 . . . . 5 |- ((2 x. 2) x. (R^2)) = (4 x. (R^2))
44212timesi 7187 . . . . . 6 |- (2 x. (R^2)) = ((R^2) + (R^2))
4544opreq2i 4893 . . . . 5 |- (2 x. (2 x. (R^2))) = (2 x. ((R^2) + (R^2)))
4641, 43, 453eqtr3i 1918 . . . 4 |- (4 x. (R^2)) = (2 x. ((R^2) + (R^2)))
4740, 46opreq12i 4894 . . 3 |- (((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2))) - (4 x. (R^2))) = ((2 x. (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))))) - (2 x. ((R^2) + (R^2))))
4821, 21addcli 6473 . . . . 5 |- ((R^2) + (R^2)) e. CC
4935, 36addcli 6473 . . . . 5 |- (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))) e. CC
5048, 49addcli 6473 . . . 4 |- (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) e. CC
511, 50, 48subdii 6592 . . 3 |- (2 x. ((((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) - ((R^2) + (R^2)))) = ((2 x. (((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))))) - (2 x. ((R^2) + (R^2))))
5248, 49, 48addsubassi 6546 . . . . 5 |- ((((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) - ((R^2) + (R^2))) = (((R^2) + (R^2)) + ((((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))) - ((R^2) + (R^2))))
5348, 49pncan3i 6535 . . . . 5 |- (((R^2) + (R^2)) + ((((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))) - ((R^2) + (R^2)))) = (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))
5423, 24, 30, 31add4i 6496 . . . . . 6 |- (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))) = (((2 x. (R x. (1 / D))) + (2 x. (R x. (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))
5518, 19, 27adddii 6479 . . . . . . . . 9 |- (R x. ((1 / D) + (1 / G))) = ((R x. (1 / D)) + (R x. (1 / G)))
5655opreq2i 4893 . . . . . . . 8 |- (2 x. (R x. ((1 / D) + (1 / G)))) = (2 x. ((R x. (1 / D)) + (R x. (1 / G))))
571, 22, 29adddii 6479 . . . . . . . 8 |- (2 x. ((R x. (1 / D)) + (R x. (1 / G)))) = ((2 x. (R x. (1 / D))) + (2 x. (R x. (1 / G))))
5856, 57eqtri 1908 . . . . . . 7 |- (2 x. (R x. ((1 / D) + (1 / G)))) = ((2 x. (R x. (1 / D))) + (2 x. (R x. (1 / G))))
5958opreq1i 4892 . . . . . 6 |- ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) = (((2 x. (R x. (1 / D))) + (2 x. (R x. (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))
6054, 59eqtr4i 1911 . . . . 5 |- (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2))) = ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))
6152, 53, 603eqtri 1912 . . . 4 |- ((((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) - ((R^2) + (R^2))) = ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))
6261opreq2i 4893 . . 3 |- (2 x. ((((R^2) + (R^2)) + (((2 x. (R x. (1 / D))) + ((1 / D)^2)) + ((2 x. (R x. (1 / G))) + ((1 / G)^2)))) - ((R^2) + (R^2)))) = (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))))
6347, 51, 623eqtr2i 1915 . 2 |- (((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2))) - (4 x. (R^2))) = (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))))
643nncni 7115 . . . . . . . 8 |- D e. CC
6564, 5sqrecii 7864 . . . . . . 7 |- ((1 / D)^2) = (1 / (D^2))
663nnlesqi 7911 . . . . . . . 8 |- D <_ (D^2)
673nngt0i 7133 . . . . . . . . 9 |- 0 < D
684sqgt0i 7872 . . . . . . . . . 10 |- (D =/= 0 -> 0 < (D^2))
695, 68ax-mp 7 . . . . . . . . 9 |- 0 < (D^2)
704resqcli 7868 . . . . . . . . . 10 |- (D^2) e. RR
714, 70lereci 7063 . . . . . . . . 9 |- ((0 < D /\ 0 < (D^2)) -> (D <_ (D^2) <-> (1 / (D^2)) <_ (1 / D)))
7267, 69, 71mp2an 761 . . . . . . . 8 |- (D <_ (D^2) <-> (1 / (D^2)) <_ (1 / D))
7366, 72mpbi 206 . . . . . . 7 |- (1 / (D^2)) <_ (1 / D)
7465, 73eqbrtri 3356 . . . . . 6 |- ((1 / D)^2) <_ (1 / D)
7510nncni 7115 . . . . . . . 8 |- G e. CC
7675, 12sqrecii 7864 . . . . . . 7 |- ((1 / G)^2) = (1 / (G^2))
7710nnlesqi 7911 . . . . . . . 8 |- G <_ (G^2)
7810nngt0i 7133 . . . . . . . . 9 |- 0 < G
7911sqgt0i 7872 . . . . . . . . . 10 |- (G =/= 0 -> 0 < (G^2))
8012, 79ax-mp 7 . . . . . . . . 9 |- 0 < (G^2)
8111resqcli 7868 . . . . . . . . . 10 |- (G^2) e. RR
8211, 81lereci 7063 . . . . . . . . 9 |- ((0 < G /\ 0 < (G^2)) -> (G <_ (G^2) <-> (1 / (G^2)) <_ (1 / G)))
8378, 80, 82mp2an 761 . . . . . . . 8 |- (G <_ (G^2) <-> (1 / (G^2)) <_ (1 / G))
8477, 83mpbi 206 . . . . . . 7 |- (1 / (G^2)) <_ (1 / G)
8576, 84eqbrtri 3356 . . . . . 6 |- ((1 / G)^2) <_ (1 / G)
866resqcli 7868 . . . . . . 7 |- ((1 / D)^2) e. RR
8713resqcli 7868 . . . . . . 7 |- ((1 / G)^2) e. RR
8886, 87, 6, 13le2addi 6774 . . . . . 6 |- ((((1 / D)^2) <_ (1 / D) /\ ((1 / G)^2) <_ (1 / G)) -> (((1 / D)^2) + ((1 / G)^2)) <_ ((1 / D) + (1 / G)))
8974, 85, 88mp2an 761 . . . . 5 |- (((1 / D)^2) + ((1 / G)^2)) <_ ((1 / D) + (1 / G))
9086, 87readdcli 6487 . . . . . 6 |- (((1 / D)^2) + ((1 / G)^2)) e. RR
916, 13readdcli 6487 . . . . . 6 |- ((1 / D) + (1 / G)) e. RR
92 2re 7163 . . . . . . 7 |- 2 e. RR
932, 91remulcli 6488 . . . . . . 7 |- (R x. ((1 / D) + (1 / G))) e. RR
9492, 93remulcli 6488 . . . . . 6 |- (2 x. (R x. ((1 / D) + (1 / G)))) e. RR
9590, 91, 94leadd2i 6768 . . . . 5 |- ((((1 / D)^2) + ((1 / G)^2)) <_ ((1 / D) + (1 / G)) <-> ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) <_ ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))))
9689, 95mpbi 206 . . . 4 |- ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) <_ ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G)))
97 2pos 7173 . . . . 5 |- 0 < 2
9894, 90readdcli 6487 . . . . . 6 |- ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) e. RR
9994, 91readdcli 6487 . . . . . 6 |- ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))) e. RR
10098, 99, 92lemul2i 7018 . . . . 5 |- (0 < 2 -> (((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) <_ ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))) <-> (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))) <_ (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))))))
10197, 100ax-mp 7 . . . 4 |- (((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2))) <_ ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))) <-> (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))) <_ (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G)))))
10296, 101mpbi 206 . . 3 |- (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))) <_ (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G))))
103 4re 7166 . . . . . . . 8 |- 4 e. RR
104103recni 6467 . . . . . . 7 |- 4 e. CC
10591recni 6467 . . . . . . 7 |- ((1 / D) + (1 / G)) e. CC
106104, 18, 105mulassi 6478 . . . . . 6 |- ((4 x. R) x. ((1 / D) + (1 / G))) = (4 x. (R x. ((1 / D) + (1 / G))))
10742opreq1i 4892 . . . . . 6 |- ((2 x. 2) x. (R x. ((1 / D) + (1 / G)))) = (4 x. (R x. ((1 / D) + (1 / G))))
10818, 105mulcli 6474 . . . . . . 7 |- (R x. ((1 / D) + (1 / G))) e. CC
1091, 1, 108mulassi 6478 . . . . . 6 |- ((2 x. 2) x. (R x. ((1 / D) + (1 / G)))) = (2 x. (2 x. (R x. ((1 / D) + (1 / G)))))
110106, 107, 1093eqtr2ri 1916 . . . . 5 |- (2 x. (2 x. (R x. ((1 / D) + (1 / G))))) = ((4 x. R) x. ((1 / D) + (1 / G)))
111110opreq1i 4892 . . . 4 |- ((2 x. (2 x. (R x. ((1 / D) + (1 / G))))) + (2 x. ((1 / D) + (1 / G)))) = (((4 x. R) x. ((1 / D) + (1 / G))) + (2 x. ((1 / D) + (1 / G))))
1121, 108mulcli 6474 . . . . 5 |- (2 x. (R x. ((1 / D) + (1 / G)))) e. CC
1131, 112, 105adddii 6479 . . . 4 |- (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G)))) = ((2 x. (2 x. (R x. ((1 / D) + (1 / G))))) + (2 x. ((1 / D) + (1 / G))))
114103, 2remulcli 6488 . . . . . 6 |- (4 x. R) e. RR
115114recni 6467 . . . . 5 |- (4 x. R) e. CC
116115, 1, 105adddiri 6480 . . . 4 |- (((4 x. R) + 2) x. ((1 / D) + (1 / G))) = (((4 x. R) x. ((1 / D) + (1 / G))) + (2 x. ((1 / D) + (1 / G))))
117111, 113, 1163eqtr4i 1921 . . 3 |- (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + ((1 / D) + (1 / G)))) = (((4 x. R) + 2) x. ((1 / D) + (1 / G)))
118102, 117breqtri 3360 . 2 |- (2 x. ((2 x. (R x. ((1 / D) + (1 / G)))) + (((1 / D)^2) + ((1 / G)^2)))) <_ (((4 x. R) + 2) x. ((1 / D) + (1 / G)))
11963, 118eqbrtri 3356 1 |- (((2 x. ((R + (1 / D))^2)) + (2 x. ((R + (1 / G))^2))) - (4 x. (R^2))) <_ (((4 x. R) + 2) x. ((1 / D) + (1 / G)))
Colors of variables: wff set class
Syntax hints:   <-> wb 163   e. wcel 1300   =/= wne 2017   class class class wbr 3338  (class class class)co 4884  RRcr 6385  0cc0 6386  1c1 6387   + caddc 6389   x. cmul 6391   - cmin 6445   / cdiv 6447   <_ cle 6448  NNcn 6449   < clt 6653  2c2 7145  4c4 7147  ^cexp 7811
This theorem is referenced by:  projlem6 10824
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-13 1311  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-rep 3428  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524  ax-un 3790  ax-inf2 5731
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-3or 859  df-3an 860  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-nel 2020  df-ral 2109  df-rex 2110  df-reu 2111  df-rab 2112  df-v 2294  df-sbc 2454  df-csb 2541  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-pss 2607  df-nul 2876  df-if 2983  df-pw 3035  df-sn 3049  df-pr 3050  df-tp 3052  df-op 3053  df-uni 3178  df-int 3215  df-iun 3257  df-br 3339  df-opab 3396  df-tr 3412  df-eprel 3583  df-id 3586  df-po 3591  df-so 3604  df-fr 3625  df-we 3644  df-ord 3660  df-on 3661  df-lim 3662  df-suc 3663  df-om 3950  df-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003  df-dm 4004  df-rn 4005  df-res 4006  df-ima 4007  df-fun 4008  df-fn 4009  df-f 4010  df-f1 4011  df-fo 4012  df-f1o 4013  df-fv 4014  df-opr 4886  df-oprab 4887  df-mpt 5006  df-1st 5020  df-2nd 5021  df-iota 5089  df-rdg 5140  df-1o 5177  df-oadd 5179  df-omul 5180  df-er 5318  df-ec 5320  df-qs 5323  df-en 5427  df-dom 5428  df-sdom 5429  df-undef 5556  df-riota 5560  df-ni 6152  df-pli 6153  df-mi 6154  df-lti 6155  df-plpq 6187  df-mpq 6188  df-enq 6189  df-nq 6190  df-plq 6191  df-mq 6192  df-rq 6193  df-ltq 6194  df-1q 6195  df-np 6238  df-1p 6239  df-plp 6240  df-mp 6241  df-ltp 6242  df-plpr 6316  df-mpr 6317  df-enr 6318  df-nr 6319  df-plr 6320  df-mr 6321  df-ltr 6322  df-0r 6323  df-1r 6324  df-m1r 6325  df-c 6392  df-0 6393  df-1 6394  df-i 6395  df-r 6396  df-plus 6397  df-mul 6398  df-lt 6399  df-sub 6511  df-neg 6513  df-pnf 6654  df-mnf 6655  df-xr 6656  df-ltxr 6657  df-le 6658  df-div 6892  df-n 7108  df-2 7154  df-3 7155  df-4 7156  df-n0 7309  df-z 7345  df-seq1 7721  df-exp 7812
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