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On types of non-integrable geometrie

Friedrich, Thomas (2003)

Proceedings of the 22nd Winter School "Geometry and Physics"

A G-structure on a Riemannian manifold is said to be integrable if it is preserved by the Levi-Civita connection. In the presented paper, the following non-integrable G-structures are studied: SO(3)-structures in dimension 5; almost complex structures in dimension 6; G 2 -structures in dimension 7; Spin(7)-structures in dimension 8; Spin(9)-structures in dimension 16 and F 4 -structures in dimension 26. G-structures admitting an affine connection with totally skew-symmetric torsion are characterized....

On Urysohn's lemma

Dowker, C. H. (1967)

General Topology and its Relations to Modern Analysis and Algebra

On using artificial compressibility method for solving turbulent flows

Louda, Petr, Kozel, Karel, Příhoda, Jaromír (2012)

Applications of Mathematics 2012

In this work, artificial compressibility method is used to solve steady and unsteady flows of viscous incompressible fluid. The method is based on implicit higher order upwind discretization of Navier-Stokes equations. The extension for unsteady simulation is considered by increasing artificial compressibility parameter or by using dual time stepping. The methods are tested on laminar flow around circular cylinder and used to simulate turbulent unsteady flows by URANS approach. The simulated cases...

Ongoing Efforts to Generate “Tagged PDF” using pdfTeX

Moore, Ross (2009)

Towards a Digital Mathematics Library. Grand Bend, Ontario, Canada, July 8-9th, 2009

Recently PDF has been accepted as a standard for production of electronic documents, as ISO 32000-1:2008, with an acronym of PDF/UA (for “Universal Accessibility”). The second draft ISO 32000-2:2009 is to include specifications for including MathML tagging of mathematical environments and expressions. This talk presents a report on work-in-progress, aimed at: developing the primitive commands for pdfTeX needed to support the production of fully tagged PDF documents; writing appropriate TeX and...

Open access: čtyři úhly pohledu

Jean-Paul Allouche, H.Garth Dales, Gert-Martin Greuel, Dirk Werner, Andrew Odłyzko, Klaus Peters (2014)

Pokroky matematiky, fyziky a astronomie

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