IOSR Journal of Mathematics (IOSR-JM)
e-ISSN: 2278-5728,p-ISSN: 2319-765X, Volume 8, Issue 3 (Sep. - Oct. 2013), PP 33-35 www.iosrjournals.org
www.iosrjournals.org 33 | Page
A Redefined Riemann Zeta Function Represented via Functional Equations Using the Osborne’s Rule
Adeniji A.A. Ekakitie E.A Mohammed M.A Amusa I.S
Department of Mathematics, University of Lagos, Akoka, Nigeria.
Department of Mathematics Yaba College of Technology, Lagos, Nigeria.
Department of Mathematics Yaba College of Technology, Lagos, Nigeria.
Department of Mathematics, University of Lagos, Akoka, Nigeria.
Abstract: Intrigues most researchers about the Riemann zeta hypothesis is the ability to employ cum different approaches with instinctive mindset to obtain some very interesting results. Motivated by their style of reasoning, the result obtained in this work of redefining or re-representation of Riemann zeta function in different forms by employing different techniques on two functional equations made the results better, simpler and concise new representations of Riemann zeta function.
Keywords: Analytic Continuation, Osborne’s rule, Riemann Zeta Function 𝐓𝐇𝐄 𝐎𝐒𝐁𝐎𝐑𝐍𝐄
′𝐒 𝐑𝐔𝐋𝐄 𝐀𝐏𝐏𝐑𝐎𝐀𝐂𝐇
Osborne′s rule gave a more comprehensive method for hyperbolic functions interms of the Euler method.
𝑟𝑒𝑐𝑎𝑙𝑙 𝑓𝑟𝑜𝑚 𝑐𝑜𝑠𝑥 =
𝑒𝑥+𝑒2−𝑥and the fact that 𝑒
𝜃𝑖= 𝑐𝑜𝑠𝜃 + 𝑖𝑠𝑖𝑛𝜃 𝐼𝑚𝑝𝑙𝑦𝑖𝑛𝑔 𝑡𝑎𝑡 ℜ 𝑒
𝑥= 𝑐𝑜𝑠𝑥 (1.0) ℜ 𝑒
𝑠2𝑙𝑛𝑥= cosh(
2𝑠𝑙𝑛𝑥) (1.1) From the Riemann zeta function
𝜁 𝑠 =
𝑠 𝑠−1 42 𝜋−2𝑠Γ 2𝑠
1∞ ∞𝑛=1
𝑒
−𝑛𝑛𝜋𝑥𝑛𝑛
2𝜋
2𝑥
54−
32𝑛𝑛𝜋𝑥
14cosh
𝑠2𝑙𝑛𝑥 𝑑𝑥 (1.2) Substituting 1.0 , into equation 1.1 , then the equation 1.2 becomes
𝜁 𝑠 =
𝑠 𝑠−1 42 𝜋−2𝑠Γ 2𝑠
1∞ ∞𝑛=1
𝑒
−𝑛𝑛𝜋𝑥𝑛𝑛
2𝜋
2𝑥
54−
32𝑛𝑛𝜋𝑥
14𝑒
2𝑠𝑙𝑛𝑥𝑑𝑥 (1.3) considering the right arm of the r. h. s side of the equation(1.3)
1∞ ∞𝑛=1
𝑒
−𝑛𝑛𝜋𝑥𝑛𝑛
2𝜋
2𝑥
54−
32𝑛𝑛𝜋𝑥
14𝑒
𝑠2𝑙𝑛𝑥𝑑𝑥 (1.4)
=
∞ ∞𝑛=1𝑛𝑛
2𝜋
2𝑥
54−
32𝑛𝑛𝜋𝑥
14𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥𝑑𝑥
1
(1.5)
=
∞𝑛=1( 𝑛𝑛
1∞ 2𝜋
2𝑥
54𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 −
1∞32𝑛𝑛𝜋𝑥
14𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 (1.6) considering the left hand side of the equation 1.6 i. e
𝑛𝑛
2𝜋
2𝑥
1∞ 54𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥
∞𝑛=1
. (1.7)
𝐿𝑒𝑡 I = 𝑥
1∞ 54𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 and introducing the integration by part:
𝑡𝑒𝑛 , 𝐼 = (
18+4𝑠14)
49𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
49(𝑛𝑛)
3𝜋
3𝑥
1∞ 94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 (1.8) From equation (1.8)
𝑆𝑢𝑝𝑝𝑜𝑠𝑒 𝑀
1= 𝑥
∞ 94𝑒
−𝑛𝑛𝜋𝑥 +𝑙𝑛𝑥𝑑𝑥, 𝑏𝑦 𝑓𝑢𝑟𝑡𝑒𝑟𝑖𝑛𝑔 𝑡𝑒 𝑖𝑛𝑡𝑒𝑔𝑟𝑎𝑡𝑖𝑜𝑛 𝑏𝑦 𝑝𝑎𝑟𝑡 𝑓𝑟𝑜𝑚 (1.9),
1
𝑀
1=
49(𝑛𝑛)
3𝜋
3 134𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥+
134𝑛𝑛𝜋 𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 −
4𝑠26𝑀
1(2.0) 𝑠𝑢𝑏𝑠𝑡𝑖𝑡𝑢𝑡𝑖𝑛𝑔 2.0 𝑖𝑛𝑡𝑜 1.8 , 𝑤𝑒 𝑜𝑏𝑡𝑎𝑖𝑛:
𝐼 = (
18+4𝑠18)[
49𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥−
49𝑛𝑛
3𝜋
3𝑀 +
4𝑠26
𝑀 =
134𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥+
134𝑛𝑛𝜋 𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 (2.1)
𝐹𝑟𝑜𝑚 2.0 , 𝑤𝑒 𝑎𝑣𝑒 𝑀
1= 26 26 + 4𝑠 [ 4
13 𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠+ 4
13 𝑛𝑛𝜋 𝑥
∞ 134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥
1
,
A Redefined Riemann Zeta Function Represented Via Functional Equations Using The Osborne’s
www.iosrjournals.org 34 | Page 𝑠𝑢𝑏𝑠𝑡𝑖𝑡𝑢𝑡𝑖𝑛𝑔 2.0 𝑖𝑛𝑡𝑜 1.8
𝐼 =
18(𝑛𝑛 )18+4𝑠2𝜋2 49𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
4(𝑛𝑛 )92𝜋2 18+4𝑠1826
26+4𝑠
[
413
𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥+
134𝑛𝑛𝜋 𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥𝑑𝑥 (2.1)
=
18(𝑛𝑛 )18+4𝑠2𝜋2 49𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
1053 +396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2(
134𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥) −
1053 +234𝑠144(𝑛𝑛)
4𝜋
4𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥𝑑𝑥 (2.2)
𝑐𝑜𝑛𝑠𝑖𝑑𝑒𝑟𝑖𝑛𝑔 𝑡𝑒 𝑟𝑖𝑔𝑡 𝑎𝑛𝑑 𝑠𝑖𝑑𝑒 𝑜𝑓 𝑡𝑒 𝑒𝑞𝑢𝑎𝑡𝑖𝑜𝑛 1.6 𝑖. 𝑒
=
32
𝑛𝑛𝜋𝑥
14𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥𝑑𝑥 =
32𝑛𝑛𝜋 𝑥
1∞ 14𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥
∞
∞ 1
𝑛=1
(2.3)
𝑆𝑢𝑝𝑝𝑜𝑠𝑒 𝑀
2= 𝑥
1∞ 14𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 (2.4) 𝑎𝑝𝑝𝑙𝑦𝑖𝑛𝑔 𝑖𝑛𝑡𝑒𝑔𝑟𝑎𝑡𝑖𝑜𝑛 𝑏𝑦 𝑝𝑎𝑟𝑡 𝑜𝑛 𝑒𝑞𝑢𝑎𝑡𝑖𝑜𝑛 (2.4)
𝑀 2 = 5+2𝑠 5 [ 4 5 𝑥
54𝑒 −𝑛𝑛𝜋𝑥 +
𝑠2𝑙𝑛𝑥 + 16𝑛𝑛𝜋 45 𝑥
94𝑒 −𝑛𝑛𝜋𝑥 +
𝑠2𝑙𝑛𝑥 + 16 45 (𝑛𝑛) 2 𝜋 2 𝑥 1 ∞
94𝑒 −𝑛𝑛𝜋𝑥 +
2𝑠𝑙𝑛𝑥 𝑑𝑥 − 16𝑛𝑛𝜋𝑠901 ∞ 𝑥54𝑒 − 𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥]
(2.5)
𝑟𝑒𝑐𝑎𝑙𝑙 𝑀
2= 𝑥
∞ 14𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥
1
𝑡𝑒𝑛 𝑓𝑟𝑜𝑚 (1.6) 𝑀
2= 2
3𝑛𝑛𝜋 𝑥
∞ 14𝑒
−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠𝑑𝑥, 𝑤𝑒 𝑜𝑏𝑡𝑎𝑖𝑛
1
𝑀 2 = 𝑛𝑛𝜋 (15+6𝑠) 10 4
5 𝑥
54𝑒 −𝑛𝑛𝜋𝑥 +
𝑠2𝑙𝑛𝑥 + 16𝑛𝑛𝜋 45 𝑥
94𝑒 −𝑛𝑛𝜋𝑥 +
𝑠2𝑙𝑛𝑥 + 16 45 (𝑛𝑛) 2 𝜋 2 𝑥 1 ∞
94𝑒 −𝑛𝑛𝜋𝑥 +
𝑠2𝑙𝑛𝑥 𝑑𝑥 − 16𝑛𝑛𝜋𝑠901 ∞ 𝑥54𝑒 − 𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥,
(2.6)
𝑓𝑟𝑜𝑚 𝑡𝑒 𝑒𝑞𝑢𝑎𝑡𝑖𝑜𝑛 1.6 , 𝑠𝑢𝑏𝑠𝑡𝑖𝑡𝑢𝑡𝑖𝑛𝑔 𝐼 𝑎𝑛𝑑 𝑀
2, 𝑡𝑜 𝑜𝑏𝑡𝑎𝑖𝑛 𝐸𝑞𝑢𝑎𝑡𝑖𝑜𝑛 1.6 , 𝑏𝑒𝑐𝑜𝑚𝑒𝑠
=
18(𝑛𝑛 )2𝜋2 18+4𝑠
4
9
𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
1053 +396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2 413
𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
1053 +234𝑠144𝑛𝑛
4𝜋
4𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥𝑑𝑥 − 10𝑛𝑛𝜋15+6𝑠45𝑥54𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥+16𝑛𝑛𝜋45𝑥94𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥+1645𝑛𝑛2𝜋21∞𝑥94𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥
−16𝑛𝑛𝜋𝑠901∞𝑥54𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥 (2.7)
𝑟𝑒𝑐𝑎𝑙𝑙 𝑀
2= 𝑥
14𝑒
−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠𝑑𝑥
∞
1
, 𝐼 = 𝑥
54𝑒
−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠𝑑𝑥
∞
1
, 𝑀
1= 𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠𝑑𝑥
∞
=
1 18 𝑛𝑛 2𝜋218+4𝑠 4
9
𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
468 𝑛𝑛 2𝜋21053 +396𝑠+36𝑠2 134𝑥134𝑒−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠
−
1053 +234𝑠144𝑛𝑛
4𝜋
4𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 − 40𝑥54𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑛𝑛𝜋75+30𝑠+160𝑛𝑛𝜋𝑥94𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑛𝑛𝜋675+3270𝑠−16𝑛𝑛2𝜋2𝑛𝑛𝜋675+270𝑠 𝑀1+16𝑛𝑛𝜋𝑠𝑛𝑛𝜋1375+540𝑠𝐼 (2.8)
𝑐𝑜𝑙𝑙𝑒𝑐𝑡𝑖𝑛𝑔 𝑙𝑖𝑘𝑒 𝑡𝑒𝑟𝑚𝑠, 𝑤𝑒 𝑎𝑣𝑒:
=
18(𝑛𝑛 )18+4𝑠2𝜋2 49𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
1053 +396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2 413
𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥−
40𝑥54𝑒−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥
𝑛𝑛𝜋 75+30𝑠
+
160𝑛𝑛𝜋 𝑥94𝑒−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥 𝑛𝑛𝜋 675+3270𝑠
−
144
1053 +234𝑠
𝑛𝑛
4𝜋
4𝑥
1∞ 134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥𝑑𝑥 −
𝑛𝑛𝜋 675+270𝑠 16 𝑛𝑛 2𝜋2𝑀
1+
𝑛𝑛𝜋 1375+540𝑠 16𝑛𝑛𝜋𝑠𝐼
(2.9) 𝑟𝑒𝑐𝑎𝑙𝑙 𝑓𝑟𝑜𝑚 1.6 , 𝑏𝑦 𝑠𝑖𝑚𝑝𝑙𝑖𝑓𝑦𝑖𝑛𝑔 𝑤𝑒 𝑜𝑏𝑡𝑎𝑖𝑛
=
18(𝑛𝑛 )2𝜋2
18+4𝑠 4
9
𝑥
94𝑒
−𝑛𝑛𝜋𝑥 +2𝑠𝑙𝑛𝑥−
1053 +396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2(
134𝑥
134𝑒
−𝑛𝑛𝜋𝑥 +𝑠2𝑙𝑛𝑥) −
40𝑥54𝑒−𝑛𝑛𝜋𝑥 +2𝑙𝑛𝑥𝑠 𝑛𝑛𝜋 (75+30𝑠)
+
∞𝑛=1
160𝑛𝑛𝜋𝑥94𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑛𝑛𝜋(675+3270𝑠)−1441053+234𝑠(𝑛𝑛)4𝜋41∞𝑥134𝑒−𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥−16(𝑛𝑛
)2𝜋2𝑛𝑛𝜋(675+270𝑠)𝑀1+16𝑛𝑛𝜋𝑠𝑛𝑛𝜋(1375+540𝑠)𝐼
(3.0)
=
𝑒
−𝑛𝑛𝜋𝑥18(𝑛𝑛 )18+4𝑠2𝜋2 49
𝑥
94𝑒
2𝑠𝑙𝑛𝑥−
1053+396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2(
134𝑥
134𝑒
2𝑠𝑙𝑛𝑥) −
40𝑥54𝑒𝑠2𝑙𝑛𝑥
𝑛𝑛𝜋 (75+30𝑠)
+
160 𝑛𝑛𝜋 𝑥94𝑒2𝑙𝑛𝑥𝑠 𝑛𝑛𝜋 (675+3270𝑠)
−
∞𝑛=1
1441053+234𝑠(𝑛𝑛)4𝜋41 ∞ 𝑥134𝑒 − 𝑛𝑛𝜋𝑥+𝑠2𝑙𝑛𝑥𝑑𝑥 − 16𝑛𝑛2𝜋2𝑛𝑛𝜋(675+270𝑠)𝑀1+16𝑛𝑛𝜋𝑠𝑛𝑛𝜋(1375+540𝑠)𝐼
(3.1)
A Redefined Riemann Zeta Function Represented Via Functional Equations Using The Osborne’s
www.iosrjournals.org 35 | Page 𝐿𝑒𝑡 𝑒
−𝑛𝑛𝜋𝑥∞ 𝑛=1
= 𝜓 𝑥 𝑎𝑛𝑑 𝑒
𝑙𝑛𝑥𝑠2= 𝑥
2𝑠Then equations 3.1 becomes
= 𝜓(𝑥)𝑥
𝑠218(𝑛𝑛 )
2𝜋
218+4𝑠 4
9 𝑥
94− 468 𝑛𝑛
2𝜋
21053 +396𝑠+36𝑠
2( 4
13 𝑥
134) − 40𝑥
5 4
𝑛𝑛𝜋 (75+30𝑠) + 160𝑛𝑛𝜋 𝑥
9 4
𝑛𝑛𝜋 (675+3270 𝑠) −
144
1053 +234𝑠 (𝑛𝑛) 4 𝜋 4 𝑥
134𝑒 −𝑛𝑛𝜋𝑥 +
2𝑠𝑙𝑛𝑥 𝑑𝑥 − 16(𝑛𝑛 )
2𝜋
2𝑛𝑛𝜋 (675+270𝑠) 𝑀 1 + 16𝑛𝑛𝜋𝑠
𝑛𝑛𝜋 (1375 +540𝑠) 𝐼
∞
1 (3.2)
𝑆𝑢𝑏𝑠𝑡𝑖𝑡𝑢𝑡𝑖𝑛𝑔 3.0 𝑖𝑛𝑡𝑜 1.2 𝜁 𝑠 =
𝑠 𝑠−1 42 𝜋−𝑠2Γ 2𝑠
𝜓(𝑥)𝑥
𝑠218(𝑛𝑛 )18+4𝑠2𝜋2 49
𝑥
94−
1053 +396𝑠+36𝑠468 𝑛𝑛 2𝜋2 2(
134𝑥
134) −
40𝑥54
𝑛𝑛𝜋 (75+30𝑠)
+
160𝑛𝑛𝜋 𝑥94
𝑛𝑛𝜋 (675+3270𝑠)