• 제목/요약/키워드: $K_p$

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ON ℤpp[u]/k>-CYCLIC CODES AND THEIR WEIGHT ENUMERATORS

  • Bhaintwal, Maheshanand;Biswas, Soumak
    • 대한수학회지
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    • 제58권3호
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    • pp.571-595
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    • 2021
  • In this paper we study the algebraic structure of ℤpp[u]/k>-cyclic codes, where uk = 0 and p is a prime. A ℤpp[u]/k>-linear code of length (r + s) is an Rk-submodule of ℤrp × Rsk with respect to a suitable scalar multiplication, where Rk = ℤp[u]/k>. Such a code can also be viewed as an Rk-submodule of ℤp[x]/r - 1> × Rk[x]/s - 1>. A new Gray map has been defined on ℤp[u]/k>. We have considered two cases for studying the algebraic structure of ℤpp[u]/k>-cyclic codes, and determined the generator polynomials and minimal spanning sets of these codes in both the cases. In the first case, we have considered (r, p) = 1 and (s, p) ≠ 1, and in the second case we consider (r, p) = 1 and (s, p) = 1. We have established the MacWilliams identity for complete weight enumerators of ℤpp[u]/k>-linear codes. Examples have been given to construct ℤpp[u]/k>-cyclic codes, through which we get codes over ℤp using the Gray map. Some optimal p-ary codes have been obtained in this way. An example has also been given to illustrate the use of MacWilliams identity.

EXTREMUM PROPERTIES OF DUAL Lp-CENTROID BODY AND Lp-JOHN ELLIPSOID

  • Ma, Tong-Yi
    • 대한수학회보
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    • 제49권3호
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    • pp.465-479
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    • 2012
  • For $0<p{\leq}{\infty}$ and a convex body $K$ in $\mathbb{R}^n$, Lutwak, Yang and Zhang defined the concept of dual $L_p$-centroid body ${\Gamma}_{-p}K$ and $L_p$-John ellipsoid $E_pK$. In this paper, we prove the following two results: (i) For any origin-symmetric convex body $K$, there exist an ellipsoid $E$ and a parallelotope $P$ such that for $1{\leq}p{\leq}2$ and $0<q{\leq}{\infty}$, $E_qE{\supseteq}{\Gamma}_{-p}K{\supseteq}(nc_{n-2,p})^{-\frac{1}{p}}E_qP$ and $V(E)=V(K)=V(P)$; For $2{\leq}p{\leq}{\infty}$ and $0<q{\leq}{\infty}$, $2^{-1}{\omega_n}^{\frac{1}{n}}E_qE{\subseteq}{\Gamma}_{-p}K{\subseteq}{2\omega_n}^{-\frac{1}{n}}(nc_{n-2,p})^{-\frac{1}{p}}E_qP$ and $V(E)=V(K)=V(P)$. (ii) For any convex body $K$ whose John point is at the origin, there exists a simplex $T$ such that for $1{\leq}p{\leq}{\infty}$ and $0<q{\leq}{\infty}$, ${\alpha}n(nc_{n-2,p})^{-\frac{1}{p}}E_qT{\supseteq}{\Gamma}_{-p}K{\supseteq}(nc_{n-2,p})^{-\frac{1}{p}}E_qT$ and $V(K)=V(T)$.

ON A CLASS OF ANALYTIC FUNCTIONS INVOLVING RUSCHEWEYH DERIVATIVES

  • Yang, Dinggong;Liu, Jinlin
    • 대한수학회보
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    • 제39권1호
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    • pp.123-131
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    • 2002
  • Let A(p, k) (p, k$\in$N) be the class of functions f(z) = $z^{p}$ + $a_{p+k}$ $z^{p+k}$+… analytic in the unit disk. We introduce a subclass H(p, k, λ, $\delta$, A, B) of A(p, k) by using the Ruscheweyh derivative. The object of the present paper is to show some properties of functions in the class H(p, k, λ, $\delta$, A, B). B).

어유의 산화안정성 예측 (Oxidation Stability Model of Fish Oil)

  • Jeong-Hwa Hong;Jin-Woo Kim;Dae-Seok Byun
    • 한국식품영양과학회지
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    • 제24권3호
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    • pp.384-388
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    • 1995
  • 어유는 고도불포화지방산 함량이 높아 산화가 쉽게 되므로 식품가공용이나 기능성식품으로 응용되기에는 많은 제약이 따른다. 이러한 문제를 해결하기 위하여 어유의 산화안정성을 예측할 수 있는 기본 모델을 다음과 같은 식을 이용하여 제시하였다. $dp/dt=k{\cdot}p(t){\cdot}[P_{max}\;-\;p(t)]$. 상기식을 적분하면, $p(t)=P_{max}/[1\;+\;[(P_{max}/P_{(0)})\;-\;-1]{\cdot}EXP(-K_p{\cdot}t)]$. 여기서 산화온도가 50, 60와 70 및 $80^{\circ}C$ 일 때, $K_p$는 각각 0.00535, 0.01345와 0.02516 및 0.04657였다. 상기식은 대부분 측정치와 잘 일치하였다. 또한 $K_p$를 아래와 같이 온도의 함수로 표현할 수 있었다. $K_p=(1/P_{max})EXP\;[1\;-\;(8148/T)+20.1]$. 여기서 T 절대온도($^{o}K$)이다.

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패스워드 기반 인증 프로토콜 K1P의 확장 (Extending the Password-based Authentication Protocol K1P)

  • 권태경;송주석
    • 한국통신학회논문지
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    • 제23권7호
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    • pp.1851-1859
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    • 1998
  • 본 논문에서는 선행 논문인 [1]과 [2]에서 제안한 바 있는 패스워드 기반 인증 프로토콜 K1P의 특징을 요약하고 세가지의 확장된 프로토콜을 제안한다. 제안된 프로토콜들은 K1P의 설계 개념인 안전성과 효율성을 유지하도록 하였으며, 각기 다양한 목적에 따라 사용될 수 있도록 하였다. 새롭게 제안된 프로토콜은 일시 키-K1P, 사용자 공개키-K1P, 그리고 지수적 키 교환-K1P, 그리고 지수적 키 교환-K1P 등이다.

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ON (p, k )-QUASIPOSINORMAL OPERATORS

  • Lee, Mi-Young;Lee, Sang-Hun
    • Journal of applied mathematics & informatics
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    • 제19권1_2호
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    • pp.573-578
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    • 2005
  • For a positive integer k and a positive number 0 < p$\le$1, an operator T is said to be (p, k)-quasiposinormal if $T^{{\ast}k}(c^2(T^{\ast}T)P - (TT^{\ast})^P)T^k {\ge} 0$ for some c > o. In this paper we consider a structure for (p, k)-quasiposinormal.

Decimation에 의해 생성된 p-진 m-시퀀스 군의 상호 상관 값의 분포 (Cross-Correlation Distribution of a p-ary m-Sequence Family Constructed by Decimation)

  • 서은영;김영식;노종선;신동준
    • 한국통신학회논문지
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    • 제33권9C호
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    • pp.669-675
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    • 2008
  • 홀수인 소수 p와 n=4k, 그리고 $d=((p^2k+1)/2)^2$에 대해서, 주기가 $p^n-1$인 p-진 m-수열 s(t)에 대해서 $(p^{2k}+1)/2$개의 서로 다른 decimated 수열들 s(dt+1), $0{\leq}l<(p^{2k}+1)/2$가 존재한다. 이 논문에서는 s(t)와 s(dt+l), $0{\leq}l<(p^{2k}+1)/2$ 사이의 상호상관 값이 $\{-1,-1{\pm}\sqrt{p^n},-1+2\sqrt{p^n}\}$과 같음을 보이고, 상호 상관 값의 분포를 유도하였다.

General Linear Group over a Ring of Integers of Modulo k

  • Han, Juncheol
    • Kyungpook Mathematical Journal
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    • 제46권2호
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    • pp.255-260
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    • 2006
  • Let $m$ and $k$ be any positive integers, let $\mathbb{Z}_k$ the ring of integers of modulo $k$, let $G_m(\mathbb{Z}_k)$ the group of all $m$ by $m$ nonsingular matrices over $\mathbb{Z}_k$ and let ${\phi}_m(k)$ the order of $G_m(\mathbb{Z}_k)$. In this paper, ${\phi}_m(k)$ can be computed by the following investigation: First, for any relatively prime positive integers $s$ and $t$, $G_m(\mathbb{Z}_{st})$ is isomorphic to $G_m(\mathbb{Z}_s){\times}G_m(\mathbb{Z}_t)$. Secondly, for any positive integer $n$ and any prime $p$, ${\phi}_m(p^n)=p^{m^2}{\cdot}{\phi}_m(p^{n-1})=p{^{2m}}^2{\cdot}{\phi}_m(p^{n-2})={\cdots}=p^{{(n-1)m}^2}{\cdot}{\phi}_m(p)$, and so ${\phi}_m(k)={\phi}_m(p_1^n1){\cdot}{\phi}_m(p_2^{n2}){\cdots}{\phi}_m(p_s^{ns})$ for the prime factorization of $k$, $k=p_1^{n1}{\cdot}p_2^{n2}{\cdots}p_s^{ns}$.

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INTEGRAL BASES OVER p-ADIC FIELDS

  • Zaharescu, Alexandru
    • 대한수학회보
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    • 제40권3호
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    • pp.509-520
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    • 2003
  • Let p be a prime number, $Q_{p}$ the field of p-adic numbers, K a finite extension of $Q_{p}$, $\bar{K}}$ a fixed algebraic closure of K and $C_{p}$ the completion of K with respect to the p-adic valuation. Let E be a closed subfield of $C_{p}$, containing K. Given elements $t_1$...,$t_{r}$ $\in$ E for which the field K($t_1$...,$t_{r}$) is dense in E, we construct integral bases of E over K.

The Polynomial Numerical Index of Lp(μ)

  • Kim, Sung Guen
    • Kyungpook Mathematical Journal
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    • 제53권1호
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    • pp.117-124
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    • 2013
  • We show that for 1 < $p$ < ${\infty}$, $k$, $m{\in}\mathbb{N}$, $n^{(k)}(l_p)=inf\{n^{(k)}(l^m_p):m{\in}\mathbb{N}\}$ and that for any positive measure ${\mu}$, $n^{(k)}(L_p({\mu})){\geq}n^{(k)}(l_p)$. We also prove that for every $Q{\in}P(^kl_p:l_p)$ (1 < $p$ < ${\infty}$), if $v(Q)=0$, then ${\parallel}Q{\parallel}=0$.