Robin Harte and David Larson The first author was partially supported by Enterprise Ireland grant number IC/2001/027 Abstract We offer a perturbation theory for finite ascent and descent properties of bounded operators. There are various degrees of “skew exactness” ([10];[7] (10.9.0.1), (10.9.0.2)) between compatible pairs of operators, bounded and linear between normed spaces: 1. Definition Su...

Abstract   In this study, generalized differential quadrature analysis of elastic/plastic buckling of skew thin plates is presented. The governing equations are derived for the first time based on the incremental and deformation theories of plasticity and classical plate theory (CPT). The elastic/plastic behavior of plates is described by the Ramberg-Osgood model. The ranges of plate geometries...

The notion of skew confluence was introduced to characterize non-confluent term rewriting systems that had unique infinite normal forms or Böhm like trees. This notion however is not expressive enough to deal with all possible sources of non-confluence in the context of infinite terms or terms extended with letrec. To that end, we present a new notion called ω-skew confluence. We show that ω-sk...

An operator T on a complex Hilbert space H is called skew symmetric if T can be represented as a skew symmetric matrix relative to some orthonormal basis for H. In this note, we explore the structure of skew symmetric operators with disconnected spectra. Using the classical Riesz decomposition theorem, we give a decomposition of certain skew symmetric operators with disconnected spectra. Severa...

We study frequentist risk properties of predictive density estimators for mean mixtures multivariate normal distributions, involving an unknown location parameter θ∈Rd, and which include skew distributions. provide explicit representations Bayesian posterior densities, including the benchmark minimum equivariant (MRE) density, is minimax generalized Bayes with respect to improper uniform θ. For...

‎‎a natural generalization of two dimensional cyclic code ($t{tdc}$) is two dimensional skew cyclic code‎. ‎it is well-known that there is a correspondence between two dimensional skew cyclic codes and left ideals of the quotient ring $r_n:=f[x,y;rho,theta]/_l$‎. ‎in this paper we characterize the left ideals of the ring $r_n$ with two methods and find the generator matrix for two dimensional s...

This paper discusses the generalized Black-Scholes-Merton model, where volatility coefficient, drift coefficient of stocks, and interest rate are time-dependent deterministic functions. Together with it, we make assumption that volatility, drift, depend on a gamma or inverse-gamma random variable. model includes models skew Student’s t- variance-gamma-distributed stock log-returns. The price Eu...

In this paper, we study skew (A,m)-symmetric operators in a complex Hilbert space H. Firstly, by introducing the generalized notion of left invertibility show that if T ? B(H) is (A,m)-symmetric, then eisT (A,m)-invertible for every s R. Moreover, examine some conditions (A,m)- symmetric to be (A,m?1)-symmetric. The connection between c0-semigroups (A,m)-isometries and (A,m)-symmetries also des...