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For a skew normal random sequence, convergence rates of the distribution of its partial maximum to the Gumbel extreme value distribution are derived. The asymptotic expansion of the distribution of the normalized maximum is given under an optimal choice of norming constants. We find that the optimal convergence rate of the normalized maximum to the Gumbel… (More)

- Zuoxiang Peng, Zhichao Weng, Saralees Nadarajah
- Mathematics and Computers in Simulation
- 2010

We derive under some regular conditions an almost sure local central limit theorem for the product of partial sums of a sequence of independent identically distributed positive random variables. Running Title: Almost sure local CLT for the product of partial sums.

In this short note, we focus on the limiting behaviors of moments for normalized partial maxima of skew-normal samples. Under optimal norming constants, asymptotic expansions for moments of maxima of skew-normal samples are derived. These expansions are used to deduce convergence rates of moments of the normalized maxima to the moments of the corresponding… (More)

Logarithmic general error distribution, an extension of the log-normal distribution , is proposed. Some interesting properties of the logarithmic general error distribution are derived. These properties are applied to establish the asymptotic behavior of the ratio of probability densities and the ratio of the tails of the logarithmic general error and… (More)

- UDC, CHENG-XIU LING, ZUOXIANG PENG, SARALEES NADARAJAH
- 2009

The moment estimator (Dekkers et al. (1989)) has been used in extreme value theory to estimate the tail index, but it is not location invariant. The location invariant Hill-type estimator (Fraga Alves (2001)) is only suitable for estimating positive indices. In this paper, a new moment-type estimator is studied, which is location invariant. This new… (More)

- Xin Liao, Zuoxiang Peng, Saralees Nadarajah
- J. Applied Probability
- 2013

We discuss tail behaviors, subexponentiality and extreme value distribution of logarithmic skew-normal random variables. With optimal normalized constants, the asymptotic expansion of the distribution of the normalized maximum of logarithmic skew-normal random variables is derived. It shows that the convergence rate of the distribution of the normalized… (More)

- ZUOXIANG PENG, SARALEES NADARAJAH
- 2006

Suppose X1,X2, . . . are independent and identically distributed (iid) random variables with common distribution function (df) F. Let Mn =max{X1, . . . ,Xn} denote the maximum of the first n random variables and let w(F) = sup{x : F(x) < 1} denote the upper end point of F. The extreme value theory seeks norming constants an > 0, bn ∈ and a nondegenerate df… (More)

Consider a triangular array of mean zero Gaussian random variables. Under some weak conditions this paper proves that the partial sums and the point processes of exceedances formed by the array are asymptotically independent. For a standardized stationary Gaussian sequence, it is shown under some mild conditions that the point process of exceedances formed… (More)

- Lunfeng Cao, Zuoxiang Peng
- Appl. Math. Lett.
- 2011