Sökning: "class numbers"

Visar resultat 21 - 25 av 92 avhandlingar innehållade orden class numbers.

1. 21. P-adic dynamical systems and van der Put basis technique

   Författare :Ekaterina Yurova Axelsson; Andrei Khrennikov; Franco Vivaldi; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dynamical systems; p-adic; 1-Lipschitz; measure-preserving; ergodicity; spheres; uniformly differentiable; Tillämpad matematik; Applied Mathematics;

   Sammanfattning : Theory of dynamical systems in fields of p-adic numbers is  an important part of algebraic and arithmetic dynamics. The study of p-adic dynamical systems is motivated by their applications in various areas of mathematics, e.g., in physics, genetics, biology, cognitive science, neurophysiology, computer science, cryptology, etc. LÄS MER

3. 22. Feasible Direction Methods for Constrained Nonlinear Optimization : Suggestions for Improvements

   Författare :Maria Mitradjieva-Daneva; Maud Göthe-Lundgren; Torbjörn Larsson; Clas Rydergren; Anders Forsgren; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; constrained nonlinear optimization; feasible direction methods; conjugate directions; traffic equilibrium problem; sequential linear programming algorithm; stochastic transportation problem; Optimization; systems theory; Optimeringslära; systemteori;

   Sammanfattning : This thesis concerns the development of novel feasible direction type algorithms for constrained nonlinear optimization. The new algorithms are based upon enhancements of the search direction determination and the line search steps. LÄS MER

4. 23. Numerical Study of Laminar, Transitional and Turbulent Flow Past Rectangular Cylinders

   Författare :Ahmad Sohankar Esfahani; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; blockage; outlet boundary condition; rectangular cylinders; onset of vortex shedding; angle of incidence; incompressible flow; LES; DNS; transition; finite volumes; Reynolds number; numerical simulation; square cylinder;

   Sammanfattning : The subject of flow past slender bluff bodies is of relevance to technical problems associated with energy conservation, structural design and acoustic emissions. The present work is restricted to an important sub-class of slender bluff body flow --- the incompressible flow around a stationary cylinder having a rectangular cross section, the cylinder being exposed to a constant free stream velocity. LÄS MER

5. 24. The emergence of enclaves of wealth and poverty : A sociological study of residential differentiation in post-communist Poland

   Författare :Dominika Polanska Vergara; Apostolis Papakostas; Chris Pickvance; Kerstin Jacobsson; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; residential differentiation; gated communities; Poland; post-communist cities; revitalisation; Sociology; Sociologi; Sociology; sociologi;

   Sammanfattning : Since the fall of communism, some crucial political, economic and social changes have been taking place in the former communist societies. The objective of the thesis is to examine the processes of residential differentiation taking place in the urban landscape of the Polish city of Gdańsk after the introduction of the capitalist system. LÄS MER

7. 25. Children’s early mathematics learning and development : Number game interventions and number line estimations

   Författare :Jessica Elofsson; Ulf Träff; Joakim Samuelsson; Stefan Gustafson; Camilla Björklund; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; mathematics learning and development; number knowledge and skills; intervention; number games; number line estimation; representations of number; lärande och utveckling i matematik; numeriska kunskaper och färdigheter; intervention; numeriska spel; skattningar av tal på tallinjer; representationer av tal.;

   Sammanfattning : Children’s early mathematics learning and development have become a topic of increasing interest over the past decade since early mathematical knowledge and skills have been shown to be a strong predictor of later mathematics performance. Understanding how children develop mathematical knowledge and skills and how they can be supported in their early learning could thus prove to be a vital component in promoting learning of more formal mathematics. LÄS MER