Hindawi Publishing Corporation
Journal of Inequalities and Applications
Volume 2009, Article ID 946569, 17 pages
doi:10.1155/2009/946569
Research Article
On Interpolation Functions of the Generalized
Twisted h, q-Euler Polynomials
Kyoung Ho Park
Department of Mathematics, Sogang University, Seoul 121-742, South Korea
Correspondence should be addressed to Kyoung Ho Park, sagamath@yahoo.co.kr
Received 5 November 2008; Accepted 14 January 2009
Recommended by Vijay Gupta
The aim of this paper is to construct p-adic twisted two-variable Euler-h,q-L-functions, which
interpolate generalized twisted h,q-Euler polynomials at negative integers. In this paper, we treat
twisted h,q-Euler numbers and polynomials associated with p-adic invariant integral on Zp . We
will construct two-variable twisted h,q-Euler-zeta function and two-variable h,q-L-function in
Complex s-plane.
Copyright q 2009 Kyoung Ho Park. This is an open access article distributed under the Creative
Commons Attribution License, which permits unrestricted use, distribution, and reproduction in
any medium, provided the original work is properly cited.
1. Introduction
Tsumura and Young treated the interpolation functions of the Bernoulli and Euler
polynomials in 1, 2. Kim and Simsek studied on p-adic interpolation functions of these
numbers and polynomials 3–48. In 49, Carlitz originally constructed q-Bernoulli numbers
and polynomials. Many authors studied these numbers and polynomials 4, 28, 38, 41,
50. After that, twisted h, q-Bernoulli and Euler numberspolynomials were studied by
several authors 1–32, 32–65. In 62, Whashington constructed one-variable p-adic-Lfunction which interpolates generalized classical Bernoulli numbers at negative integers.
Fox introduced the two-variable p-adi L-functions 53. Young defined p-adic integral
representation for the two-variable p-adic L-functions 64. Furthermore, Kim constructed
the two-variable p-adic q-L-function, which is interpolation function of the generalized
q-Bernoulli polynomials 8. This function is the q-extension of the two-variable p-adic
L-function. Kim constructed q-extension of the generalized formula for two-variable of
Diamond and Ferrero and Greenberg formula for two-variable p-adic L-function in the terms
of the p-adic gamma and log-gamma functions 8. Kim and Rim introduced twisted q-Euler
numbers and polynomials associated with basic twisted q--functions 28. Also, Jang et al.
investigated the p-adic analogue twisted q--function, which interpolates generalized twisted
2
Journal of Inequalities and Applications
q-Euler numbers En,q,ξ,χ attached to Dirichlet’s character χ 55. Kim et al. have studied
two-variable p-adic L-functions, which interpolate the generalized Bernoulli polynomials at
negative integers. In this paper, we will construct two-variale p-adic twisted Euler h, qL-functions. This functions interpolation functions of the generalized twisted h, q-Euler
polynomials.
Let p be a fixed odd prime number. Throughout this paper Z, Zp , Qp and Cp will
respectively denote the ring of rational integers, the ring of p-adic rational integers, the field
of p-adic rational numbers and the completion of the algebraic closure of Qp . Let vp be the
normalized exponential valuation of Cp such that |p|p p−vp p p−1 . If s ∈ C, then |q| < 1.
If q ∈ Cp , we normally assume |1 − q|p < p−1/p−1 , so that qx explog q for |x|p ≤ 1.
Throughout this paper we use the following notations cf. 1–32, 32–48, 50, 51, 54–65:
xq x : q 1 − qx
,
1−q
x−q 1 − −qx
.
1q
1.1
Hence, limq → 1 xq x, for any x with |x|p ≤ 1 in the present p-adic case.
For d a fixed positive integer with p, d 1, set
Z
,
X1 Zp ,
N
N dp Z
X∗ a dpZp ,
X Xd lim
←
1.2
0<a<dp,
a,p1
a dpN Zp x ∈ X | x ≡ a mod dpN ,
where a ∈ Z satisfies the condition 0 ≤ a < dpN . The distribution is defined by
μq a dpN Zp qa
.
dpN q
1.3
We say that f is uniformly differential function at a point a ∈ Zp , and we write f ∈
UDZp , if the difference quotients, Ff x, y fx − fy/x − y have a limit f a as
x, y → a, a.
For f ∈ UDZp , the p-adic invariant q-integral on Zp is defined as 4, 18
Iq f Zp
fxdμq x lim
N →∞
1
N
p
−1
pN q
x0
fxqx .
1.4
The fermionic p-adic q-measures on Zp is defined as cf. 14–16, 18, 22, 28
−qa
,
μ−q a dpN Zp dpN −q
1.5
Journal of Inequalities and Applications
3
for f ∈ UDZp . For f ∈ UDZp , the ferminoic p-adic invariant q-integral on Zp is defined
as
p
−1
1
fxdμ−q x lim
fx−qx ,
I−q f N → ∞ pN Zp
−q x0
N
1.6
which has a sense as we see readily that the limit is convergent. For f ∈ UDZp , Cp , we note
that cf. 14, 16, 18, 22, 28
Zp
fxdμ−1 x fxdμ−1 x.
1.7
X
From the fermionic invariant integral on Zp , we derive the following integral equation
cf. 14, 35:
I−1 f1 I−1 f 2f0,
1.8
where f1 x fx 1.
2. Twisted h, q-Euler Numbers and Polynomials
In this section, we will treat some properties of twisted h, q-Euler numbers and polynomials
associated with p-adic invariant integral on Zp . From now on, we take h ∈ Z and q ∈ Cp with
|q − 1|p < p−1/p−1 . Let Cpn be the space of primitive pn th root of unity,
n
Cpn w ∈ Cpn | wp 1 .
2.1
Then, we denote
Tp lim Cpn n→∞
Cpn .
2.2
n≥0
Hence Tp is a p-adic locally constant space. For ξ ∈ Tp , we denote by φξ : Zp → Cp defined by
φξ x ξx , the locally constant function. If we take fx ξx ext , then we have cf. 35
En,ξ Zp
xn ξn dμ−1 x.
2.3
By induction in 1.8, Kim constructed the following useful identity cf. 14, 28:
n−1
I−1 fn −1n−1 I−1 f 2 −1n−1− f,
0
2.4
4
Journal of Inequalities and Applications
where n ∈ N, fn fx n. From 2.4, if n is odd, then we have
n−1
−1 f.
I−1 fn I−1 f 2
2.5
0
If we replace n by d odd into 2.5, we obtain
d−1
I−1 fd I−1 f 2
−1 f.
2.6
0
Let ξ ∈ Tp . Let χ be a Dirichlet’s character of conductor d, which d is any multiple of p
with p ≡ 1 mod 2. By substituting fx χxξx ext into 2.6, we have
∞
tn
En,ξ,χ .
I−1 χxξx ext n!
n0
2.7
Remark 2.1. In complex case, the generating function of the Euler numbers En,ξ,χ is given by
cf. 28
t
∞
2 d−1
tn
0 −1 χξ e
En,ξ,χ ,
d
dt
n!
ξ e 1
n0
|t| <
π
.
d
2.8
By using Taylor series of ext , then we can define the generalized twisted Euler numbers En,ξ,χ
attached to χ as follows cf. 55:
En,ξ,χ ξn xn χxdμ−1 x.
2.9
X
In 8, h, q-Euler numbers were defined by
h,1
En,q x
Zp
qh−1y x ynq dμ−q y,
h,1
2.10
h,1
where h ∈ Z and x ∈ Zp . In particular, if we take x 0, then En,q 0 En,q . These numbers
are called h, q-Euler numbers.
By using iterative method of p-adic invariant integral on Zp in the sense of fermionic,
we define twisted h, q-Euler numbers as follows cf. 55:
h,1
En,q,ξ x Zp
qh−1y φξ yx ynq dμ−q y.
2.11
Journal of Inequalities and Applications
5
For h ∈ Z and n ∈ N, we have that cf. 55
h,1
En,q,ξ x h,1
En,q,ξ x
n 1q 1
n
,
−1i qxi
n
1 − q i0 i
1 ξqhi
d−1
1q xa
a ha a h,1
dnq ,
−1 q ξ En,ξd ,qd
d
1 qd a0
2.12
2.13
where d ∈ N with d ≡ 1 mod 2.
h,1
h,1
Let Fq,ξ t, x be the generating function of En,q,ξ x in complex plane as follows cf.
55:
h,1
Fq,ξ t, x 1 q
∞
−1n qhn ξn etnxq
n0
∞
n0
tn
h,1
En,q,ξ x .
n!
2.14
Let χ be the Dirichlet’s character with conductor d ∈ N with d ≡ 1 mod 2. Then the
generalized twisted h, q-Euler polynomials attached to χ is given by as follows:
For n ∈ Z N ∪ {0},
h,1
En,q,ξ,χ x X
χyqh−1y ξy x ynq dμ−q y,
2.15
where h ∈ Z, d is any multiple of p with p ≡ 1 mod 2 and x ∈ Cp .
Then the distribution relation of the generalized twisted h, q-Euler polynomials is
given by as follows cf. 14:
h,1
En,q,ξ,χ x d
1q xa
a ha a h,1
dnq .
χa−1
q
ξ
E
d
d
n,q ,ξ
d
1 qd a1
2.16
3. Two-Variable Twisted h, q-Euler-Zeta Function and
h, q-L-Function
In this section, we will construct two-variable twisted h, q-Euler-zeta function and twovariable h, q-L-function in Complex s-plane. We assume q ∈ C with |q| < 1.
Firstly, we consider twisted q-Euler numbers and polynomials in C as follows cf.
55:
h,1
Fq,ξ t, x 1 q
∞
n0
∞
−1n qhn ξn etnxq
n0
tn
h,1
En,q,ξ x ,
n!
3.1
6
Journal of Inequalities and Applications
where q, x ∈ C, r ∈ Z N ∪ {0} and ξ is rth root of unity. In particular, if we take x 0,
h,1
h,1
then we have En,q,ξ 0 En,q,ξ . These numbers are called twisted Euler numbers. By using
h,1
derivative operator, we have dk /dtk Fq,ξ t, x|t0 En,q,ξ x.
From 3.1, we can define Hurwitz-type twisted h, q-Euler-zeta function as follows
cf. 55:
h,1
ζE,q,ξ s, x 1 q
∞
−1k qhk ξk
x ksq
k0
3.2
,
where q ∈ C, |q| < 1, s ∈ C, h ∈ Z and x ∈ R, 0 < x ≤ 1. Note that if x 1 in 3.2, then we see
that the twisted h, q-Euler-zeta function is defined by cf. 28, 55
h,1
ζE,q,ξ s 1 q
∞
−1k qhk ξk
k1
ksq
,
s ∈ C, Re s > 1.
3.3
For n ∈ N, we know cf. 28
h,1
h,1
ζE,q,ξ −n, x En,q,ξ x.
3.4
h,1
From now on, we will define the two-variable h, q-L-functions LE,q,ξ s, x : χ which
interpolates the generalized h, q-Euler polynomials.
Definition 3.1. Let χ be the Dirichlet’s character with conductor d with d ≡ 1 mod 2. For
s ∈ C, h ∈ Z and x ∈ R, 0 < x ≤ 1, we define
h,1
LE,q,ξ s, x : χ 1 q
∞
χn−1n qhn ξn
n0
n xsq
.
3.5
By substituting n a jd, d ≡ 1 mod 2, 1 ≤ a ≤ d and n 0, 1, 2, . . . into 3.5, then
using 3.2, we have
h,1
LE,q,ξ s, x : χ1 q
∞
d χa jd−1ajd qhajd ξajd
a1 j0
1 q
∞
d
χa−1a qha ξa a1
a jd xsq
dsq
j0
−1jd qhjd
j a x/dsqd
3.6
d
1q ax
a ha a h,1
d−s
χa−1
q
ξ
ζ
s,
q .
E,qd ,ξd
d
1 qd a1
h,1
Thus, we see the function LE,q,ξ s, x : χ which interpolates the generalized h, q-Euler
polynomials as follows.
Journal of Inequalities and Applications
7
Theorem 3.2. For s ∈ C, h ∈ Z, let χ be the Dirichlet’s character with conductor d with d ≡
1 mod 2. Then one has
d
1q ax
a ha a h,1
s,
χa−1
q
ξ
ζ
d−s
d
d
q .
E,q ,ξ
d
1 qd a1
h,1
LE,q,ξ s, x : χ 3.7
By substituting s −n with n > 0, into 3.7, we obtain
h,1
LE,q,ξ −n, x : χ d
1q ax
a ha a h,1
dnq
χa−1
q
ξ
ζ
−
n,
E,qd ,ξd
d
1 qd a1
d
1q ax
a ha a h,1
dnq
χa−1 q ξ En,qd ,ξd
d
1 qd a1
3.8
h,1
En,q,ξ,χ x,
where d ≡ 1 mod 2, d ∈ N.
Thus, we have the following theorem.
Theorem 3.3. For n ∈ N, let χ be the Dirichlet’s character with conductor d with d ≡ 1 mod 2.
Then one has
h,1
h,1
LE,q,ξ −n, x : χ En,q,ξ,χ x.
3.9
Remark 3.4. If we take x 1 in 3.5, then we have cf. 28, 55
h,1
LE,q,ξ s, χ 1 q
∞
χn−1n qhn ξn
n1
nsq
,
for s ∈ C.
3.10
From 3.9 and 3.10, we have the following corollary.
Corollary 3.5. Let χ be the Dirichlet’s character with conductor d with d ≡ 1 mod 2. Then one
has
h,1
En,q,ξ,χ x d
1q ax
a ha a h,1
χa−1
q
ξ
E
dnq .
d
d
n,q ,ξ
d
1 qd a1
3.11
Secondly, we will define two-variable twisted Euler h, q-L-function as follows.
Definition 3.6. Let χ be the Dirichlet’s character with conductor d with d ≡ 1 mod 2, d ∈ N.
For s ∈ C, h ∈ Z, x ∈ R, 0 < x ≤ 1 and ξr 1 with ξ /
1, we define
h,1
LE,q,ξ s, x : χ 1 q
∞
χk−1k qhk ξk
k0
k xsq
.
3.12
8
Journal of Inequalities and Applications
We consider the well-known identity cf. 44, 65
∞ 1
sj −1
xj .
j
1 − xs j0
3.13
By using 3.12, we define two-variable twisted Euler h, q-L-function as follows:
h,1
LE,q,ξ s, x : χ 1 q1 − qs
∞ ∞ sj −1
χk−1k ξk qhkjkx .
j
j0 k0
h,1
3.14
h,1
We will investigate the relations between LE,q,ξ s, x : χ and LE,q,ξ s, χ as follows.
Substituting k a jd, a 1, 2, . . . , d with d ≡ 1 mod 2, j 0, 1, 2, . . . , into 3.12,
we have
h,1
LE,q,ξ s, x : χ 1 q
∞
d χa jd−1ajd qhajd ξajd
a1 j0
a jd xsq
,
3.15
Thus we obtain the following theorem.
Theorem 3.7. For s ∈ C with h ∈ Z, let χ be the Dirichlet character with conductor d with d ≡
1 mod 2 and x ∈ R, 0 < x ≤ 1, ξr 1 with ξ /
1. Then one has
h,1
LE,q,ξ s, x : χ d
1q ax
a ha a h,1
d−s
χa−1
q
ξ
ζ
s,
q .
E,qd ,ξd
d
1 qd a1
3.16
By substituting s −n with n ∈ N into 3.16 and using 3.4, we can obtain
h,1
LE,q,ξ −n, x : χ d
1q ax
a ha a h,1
dnq
χa−1
q
ξ
ζ
−
n,
E,qd ,ξd
d
1 qd a1
d
1q ax
a ha a h,1
χa−1 q ξ En,qd ,ξd
dnq
d
1 qd a1
3.17
h,1
En,q,ξ,χ x.
h,1
Thus, we see that the function LE,q,w s, x : χ interpolates generalized h, q-Euler polynomials attached to χ at negative integer values of s as followings.
Theorem 3.8. For n ∈ N, let χ be the Dirichlet’s character with odd conductor d. Then one has
h,1
h,1
LE,q,ξ −n, x : χ En,q,ξ,χ x.
Note that if we take x 1, then Theorem 3.8 reduces to Theorem 3.3.
3.18
Journal of Inequalities and Applications
9
Let a and F be integers with F ≡ 1 mod 2 and 0 < a < F. For s ∈ C, we define partial
h,1
h, q-Hurwitz type zeta function HE,q,ξ s, a, x | F as follows:
h,1
HE,q,ξ s, a, x | F m≡a mod
m>0
−1m qhm ξm
.
m xsq
F,
3.19
By substituting m a jF, we have
h,1
HE,q,ξ s, a, x | F ∞
−1ajF qhajF ξajF
a jF xsq
j0
−1a qha ξa F−s
q
hj
j
∞
−1jF qF ξF s
j0 a x/F jqF
hj
j
∞
−1jF qF ξF 1 a
ha a
F−s
−1
q
ξ
q
1 qF j0 a x/F jsqF
F−s
q
3.20
−1a qha ξa h,1
ax
.
ζ
s,
F
F
E,q ,ξ
F
1 qF
By substituting 3.2, for s −n, we get
h,1
HE,q,ξ s, a, x
| F −1
Fnq
a ha a
q ξ h,1
En,qF ,ξF
1 qF
ax
.
F
h,1
3.21
h,1
Equation 3.20 means that the function HE,q,ξ s, a, x | F interpolates En,q,ξ s, a, x | F
polynomials at negative integers.
From 3.16 and 3.20, we have the following theorem.
1, let χ be the Dirichlet’s character with conductor d ∈ N
Theorem 3.9. For s ∈ C, ξr 1 with ξ /
with d ≡ 1 mod 2 and x ∈ R, 0 < x ≤ 1, F is any multiple of d. Then one has
h,1
LE,q,ξ s, x : χ 1 q
F
a1
h,1
χa−1a HE,q,ξ s, a, x | F.
3.22
Remark 3.10. If we take s 0 in 3.22, then we have
h,1
LE,q,ξ 0, x : χ 1 q
F
a1
h,1
χaHE,q,ξ 0, a, x | F
F
1q ax
a ha a h,1
.
χa−1
q
ξ
E
F
F
0,q ,ξ
F
1 qF a1
From 2.12, if we take s 0, then we have the following corollary.
3.23
10
Journal of Inequalities and Applications
1, let χ be the Dirichlet’s character with conductor d ∈ N
Corollary 3.11. For s ∈ C, ξr 1 with ξ /
with d ≡ 1 mod 2 and x ∈ R, 0 < x ≤ 1, F is any multiple of d. Then one has
h,1
LE,q,ξ 0, x : χ F
1 q2
χa−1a qha ξa .
1 qF 1 ξqh a1
3.24
4. p-Adic Twisted Two-Variable Euler h, q-L-Functions
In 62, Washington constructed one-variable p-adic-L-function which interpolates generalized classical Bernoulli numbers negative integers. Kim 22 investigated the p-adic
analogues of two-variables Euler q-L-function. In this section, we will construct p-adic
twisted two-variable Euler-h, q-L-functions, which interpolate generalized twisted h, qEuler polynomials at negative integers. Our notations and methods are essentially due to
Kim and Washington cf. 22, 62.
We assume that q ∈ Cp with |1 − q|p < p−1/p−1 , so that qx expx log q. Let p be
an odd prime number. Let ω denote the Teichmüller character having conductor p. For an
arbitrary character χ, we define χn χω−n , where n ∈ Z, in the sense of the product of
characters. Let a a : q ω−1 aaq aq /ωa. Then a ≡ 1 mod p11/p−1 .
Hence we see that
a pt ω−1 a pta ptq
ω−1 aaq ω−1 aqa ptq
≡ 1 mod p11/p−1 ,
4.1
where t ∈ Cp with |t|p ≤ 1, a, p 1.
We denote the subset D of C∗p by cf. 62
D {s ∈ Cp : |s|p ≤ p1−1/p−1 }.
4.2
Let
Aj x ∞
an,j xn ,
an,j ∈ Cp , j 0, 1, 2, . . . ,
4.3
j0
be a sequence of power series, each of which converges in a fixed subset D such that
1 an,j → an,0 as j → ∞ for all n, j and
2 for each s ∈ D and ε > 0, there exists n0 n0 s, ε such that
n
an,j s < ε,
n≥n
0
for ∀j.
p
Then limj → ∞ Aj s A0 s for all s ∈ D cf. 2, 22, 50, 51, 60, 62.
4.4
Journal of Inequalities and Applications
11
Let χ be the Dirichlet’s character with conductor d with d ≡ 1 mod 2 and let F be a
positive multiple of p and d.
Now we set
h,1
LE,p,q,ξ s, x : χ F
1q χa−1a ξa a pt−s
1 qF a1,
pa
j
∞ F
−s
h,1
·
.
Ej,qF ,ξF qjapt
j
a pt qapt
j0
4.5
h,1
Then LE,p,q,ξ s, x : χ is analytic for t ∈ Cp with |t|p ≤ 1, when s ∈ D. For t ∈ Cp with |t|p ≤ 1,
we have
∞ −s
j0
j
h,1
Ej,qF ,ξF qjapt
F
a pt
j
4.6
qapt
is analytic for s ∈ D. It readily follows that
a pts ω−s aa ptsq as
∞ s m0
m
qa a−1
q ptq
m
4.7
is analytic for s ∈ Cp with |t|p ≤ 1 when s ∈ D. Thus we see that
h,1
LE,p,q,ξ 0, x : χ F
1 q
−1a χn aξa .
2 a1
4.8
Let n ∈ Z and fixed t ∈ Cp with |t|p ≤ 1. Then we have that
h,1
En,q,ξ,χn pt
Fnq
F
1q a pt
a a h,1
.
χn a−1 ξ En,qF ,ξF
F
1 qF a0
4.9
If χn p / 0, then p, dχn 1, so F/p is a multiple of dχn . Therefore, we have
h,1
χn ppnq En,qF ,ξF ,χ t
n
n
1 qp F/p−1
at
F
n
a a h,1
χn ppq
χn a−1 ξ E p F/p p F/p
n,q ,ξ p qp 1 qpF/p a0
F/p
Fnq
F
1 qp a pt
a a h,1
.
χ
a−1
ξ
E
n
F
F
n,q ,ξ
F
1 qF a0
pa
4.10
12
Journal of Inequalities and Applications
Then we note that
F
1q
1q
h,1
n h,1
n
χ
pp
E
t
F
χn a−1a ξa En,qF ,ξF
n
F
F
q
q
p
,ξ
,χ
n,q
F
n
1q
1q
a0
a pt
.
F
4.11
p|a
The difference of these equations yields
h,1
En,q,ξ,χn pt −
F
1q
1q
h,1
h,1
χn ppnq En,qF ,ξF ,χ t Fnq
χn a−1a ξa En,qF ,ξF
p
F
n
1q
1q
a0
a pt
.
F
pa
4.12
Using distribution for h, q-Euler polynomials, we easily see that
h,1
En,qF ,ξF
a pt
F
n
F−n
q a ptq
k
n F
n aptk a
h,1
ξ
Ek,qF ,ξF .
q
k
a
pt
apt
q
k0
4.13
Since χn a χaω−n a, for a, p 1, and t ∈ Cp , with |t|p ≤ 1, we have
h,1
En,q,ξ,χn pt −
1q
h,1
χn ppnq En,qF ,ξF ,χ t
n
1 qp
F−1
a pt
1q a a h,1
χ
a−1
ξ
E
n
n,qF ,ξF
F
1 qF a0
4.14
k
n F−1
1q F
n aptk
h,1
n
a a
χn a−1 ξ a pt
Ek,qF ,ξF .
q
k
1 qp a0,
a
pt
apt
q
k0
pa
From 4.5–4.14, we can derive that
h,1
En,q,ξ,χn pt −
1q
h,1
h,1
χn ppnq En,qp ,ξp ,χn t LE,p,q,ξ −n, t : χ.
1 qp
4.15
Therefore we obtain the following theorem.
Theorem 4.1. Let F be a positive integral multiple of p and d dχ with F ≡ 1 mod 2, and let
h,1
LE,p,q,ξ s, t : χ m
∞ F
1q F
−s aptm
h,1
−s
a a
χa−1
ξ
a
pt
Em,qF ,ξF .
q
m
a
pt
1 qd a1,
apt
q
m0
pa
4.16
Journal of Inequalities and Applications
13
h,1
Then LE,p,q,ξ s, t : χ is analytic for t ∈ Cp , |t|p ≤ 1, provides s ∈ D when χ 1.
Furthermore, for each n ∈ Z , we have
h,1
h,1
LE,p,q,ξ −n, t : χ En,q,ξ,χn pt −
h,1
1q
h,1
χn ppnq En,qp ,ξp ,χn t.
1 qp
h,1
4.17
h,1
Thus we note that LE,p,q,ξ s, 0 : χ LE,p,q,ξ s, χ for all s ∈ D, where LE,p,q,ξ s, χ is twisted
p-adic Euler h, q-L-function, cf. 15, 22.
h,1
We now generalized to two-variable p-adic Euler h, q-L-function, LE,p,q,ξ s, t : χ
which is first defined by the interpolation function
h,1
HE,p,q,ξ s, a, x | F −1a ha a
q ξ a pt−s
1 qF
·
∞ −s
j0
j
q
japt
j
Fq
a ptq
4.18
h,1
Ej,qF ,ξF ,
for s ∈ Zp .
From 4.18, we have that
h,1
HE,p,q,ξ −n, a, x
j
a −1a a ha
n aptj Fq
h,1
n
| F ξ q a pt
Ej,qF ,ξF
q
j
a
1 qF
q
j0
−1a ha a −n
q ξ ω aFnq En,qF ,ξF
1 qF
a
F
4.19
h,1
ω−n aHE,q,ξ −n, a, x | F.
h,1
h,1
By using the definition of HE,p,q,ξ s, a, x | F, we can express LE,p,q,ξ s, t : χ for all a ∈
Z, a, p 1 and t ∈ Cp with |t| ≤ 1 as follows:
h,1
LE,p,q,ξ s, t : χ F
a1,
pa
h,1
χaHE,p,q,ξ s, a pt | F.
4.20
h,1
We know that HE,p,q,ξ s, a pt | F is analytic for t ∈ Cp , |t| ≤ 1, when s ∈ D. The value of
h,1
h,1
∂/∂sLE,p,q,ξ s, t : χ is the coefficients of s in the expansion of LE,p,q,ξ s, t : χ at s 0. Using
the Taylor expansion at s 0, we see that
a pt−s 1 − s loga pt · · · ,
−1m
−s
s ··· .
m
m
4.21
14
Journal of Inequalities and Applications
The p-adic logarithmic function, logp , is the unique function C∗p → Cp that satisfies
logp 1 x ∞
−1n
n1
n
xn ,
logp xy logp x logp y,
|x|p < 1,
∀x, y ∈ C∗p ,
4.22
logp p 0.
By employing these expansion and some algebraic manipulations, we evaluate the derivative
h,1
∂/∂sLE,p,q,ξ 0, t : χ. It follows from the definition of LE,p,q,ξ s, t : χ that
h,1
LE,p,q,ξ s, t : χ F
1q χa−1a ξa a pt−s
F
1 q a1,
pa
m
∞ F
−s aptm
h,1
·
Em,qF ,ξF .
q
m
a
pt
qapt
m0
4.23
Thus, we have
F
1q ∂ h,1
LE,p,q,ξ s, t : χ|s0 χa−1a ξa
∂s
1 qF a1,
pa
·
− loga h,1
ptE0,qF ,ξF
m
∞
−1m aptm
F
h,1
q
Em,qF ,ξF
m
a
pt
qapt
m1
.
4.24
Since ωa is a root of unity for a, p 1, we have
logp a pt logp a pt logp ω−1 a logp a pt.
4.25
Thus we have the following theorem.
Theorem 4.2. Let χ be a primitive Dirichlet’s character with odd conductor d, d ∈ N and let F be a
odd positive integral multiple of p and d. Then for any t ∈ Cp with |t| ≤ 1, one has
F m
∞
F
1q ∂ h,1
−1m aptm
q
h,1
a a
LE,p,q,ξ s, t : χ q
χa−1
ξ
Em,qF ,ξF
F
∂s
m
a
pt
1 q a1,
q
m1
pa
F
1q −
χa−1a ξa loga pt.
2 a1
pa
4.26
Journal of Inequalities and Applications
15
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