If G is a Polish group, then the category of Polish G-spaces and continuous G-mappings has a universal object. §0. Preface It is known from [2] that 0.1. Theorem (de Vries). Let G be a separable locally compact metric group. Then the category of continuous G-maps and separable complete metric G-spaces has a universal object. In other words, there is a separable complete metric space X on which ...

A new formula for the nuclear charge radius is proposed, dependent on the mass number A and neutron excess N−Z in the nucleus. It is simple and it reproduces all the experimentally available mean square radii and their isotopic shifts of even–even nuclei much better than other frequently used relations. PACS: 21.10.Dr, 21.60.Ev ∗This work is partly supported by the Polish Committee of Scientifi...

The scaling of pion multiplicities with system size in proton-nucleus and nucleus-nucleus reactions at 200 A GeV is investigated. A nuclear geometry calculation of incoherent multiple scattering including effects of deceleration of the participating particles is presented. Pion multiplicities at high transverse momenta agree relatively well with an overall scaling with the number of binary coll...

Bu çal??man?n amac? Covid 19 salg?n?n?n BIST 100 endeksi üzerindeki etkilerini 31 Mart 2020-9 Haziran 2021 dönemi için incelemektir. Di?er çal??malardan farkl? olarak bu çal??ma, iki de?i?kenli e?-bütünle?me analizlerinin aksine üzerinde etkili olabilecek gecelik repo faizi, dolar ve alt?n gibi finansal de?i?kenlere de yer vermektedir. salg?n?n? temsilen günlük vefat say?s? hasta kullan?lm??t?r...

The mathematical basis of p-adic Higgs mechanism discussed in papers [email protected] 9410058-62 is considered in this paper. The basic properties of p-adic numbers, of their algebraic extensions and the so called canonical identification between positive real numbers and p-adic numbers are described. Canonical identification induces p-adic topology and differentiable structure on real axis ...

I review recent Lattice results. In particular, the confinement mechanism and string breaking, glueballs and hybrid mesons as well as light hadron spectroscopy are discussed.

A recurring theme of this column over the past four years has been what we have referred to as computer-generated mysteries. Examples are sequences defined by simple rational recursions whose terms turn out to be integers with interesting but unexplained divisibility properties, or geometric configurations that are observed to exist although there are no proofs of existence. In most of the exam...

The geometric non-linear Schrödinger equation (GNLS) on the complex Grassmannian manifold M is the evolution equation on the space C(R,M) of paths on M : Jγγt = ∇γxγx, where ∇ is the Levi-Civita connection of the Kähler metric and J is the complex structure. GNLS is the Hamiltonian equation for the energy functional on C(R,M) with respect to the symplectic form induced from the Kähler form on M...

After a study of the Hamiltonian group of gauge transformations, whose infinitesimal generators are the 14 first class constraints of a new formulation of canonical tetrad gravity on globally hyperbolic, asymptotically flat at spatial infinity, spacetimes with simultaneity spacelike hypersurfaces Στ diffeomorphic to R3, the multitemporal equations associated with the constraints generating spac...

Using local cohomology and algebraic D-Modules, we generalize a comparison theorem between relative de Rham cohomology and Dwork cohomology due to N. Katz, A. Adolphson and S. Sperber.