2 5 A ug 2 00 6 Parametrized ♦ principles

60 80 63 v 1 3 0 A ug 2 00 6 Chetaev vs . vakonomic prescriptions in constrained field theories with parametrized variational calculus

Starting from a characterization of admissible Cheataev and vakonomic variations in a field theory with constraints we show how the so called parametrized variational calculus can help to derive the vakonomic and the non-holonomic field equations. We present an example in field theory where the non-holonomic method proved to be unphysical.

ar X iv : q ua nt - p h / 06 02 21 6 v 2 3 A ug 2 00 6 Quasiprobability distribution functions for periodic phase - spaces : I . Theoretical Aspects

An approach featuring s-parametrized quasiprobability distribution functions is developed for situations where a circular topology is observed. For such an approach, a suitable set of angle-angular momentum coherent states must be constructed in appropriate fashion. PACS numbers: 03.65.Ca, 03.65.Fd

A ug 2 00 6 Selection principles related to α i - properties

We investigate selection principles which are motivated by Arhangel'skiˇi's α i-properties, i = 1, 2, 3, 4, and their relations with classical selection principles. It will be shown that they are closely related to the selection principle S 1 and often are equivalent to it.

ar X iv : h ep - e x / 00 08 06 5 v 1 2 6 A ug 2 00 0 Search for Large Extra Dimensions in Dielectron and Diphoton Production

A ug 2 00 6 Invariance principles for fractionally integrated nonlinear processes

Invariance principles (or functional central limit theorems) play an important role in econometrics and statistics. For example, to obtain asymptotic distributions of unit-root test statistics, researchers have applied invariance principles of various forms; see Phillips (1987), Sowell (1990) and Wu (2006) among others. The primary goal of the paper is to establish invariance principles for a c...