Statistical properties of weak Gibbs measures for complex systems with nonhyperbolic periodic orbits
Project/Area Number  13640133 
Research Category 
GrantinAid for Scientific Research (C)

Allocation Type  Singleyear Grants 
Section  一般 
Research Field 
General mathematics (including Probability theory/Statistical mathematics)

Research Institution  Sapporo University 
Principal Investigator 
YURI Michiko Sapporo University, Department of Business Administration, Professor, 経営学部, 教授 (70174836)

Project Period (FY) 
2001 – 2002

Project Status 
Completed(Fiscal Year 2002)

Budget Amount *help 
¥3,000,000 (Direct Cost : ¥3,000,000)
Fiscal Year 2002 : ¥1,400,000 (Direct Cost : ¥1,400,000)
Fiscal Year 2001 : ¥1,600,000 (Direct Cost : ¥1,600,000)

Keywords  Equilibrium state / Weak Gibbs measure / Variational principle / Intermittency / Indifferent periodic point / Conformal measure / Multifractal formalism / Zeta function / Variational Principle / Intermittency / indifferent periodic point / local product structure / Decay of correlations 
Research Abstract 
The purpose of this project is to construct mathematical models which show phase transition, failure of the Gibbs property and slow decay of correlations, that can be observed for many complex systems exhibiting Intermittency. For this purpose, we establish Thermodynamic formalism for nonHolder potentials in nonhyperbolic situation. More specifically, for countable to one transitive Markov systems we construct conformal measures ν which are weak Gibbs measures for potentials φ of weak bounded variation, and show the existence of equilibrium states μ for φ equivalent to the weak Gibbs measures ν ([1]). We see that generalized indifferent periodic orbits cause phase transition, nonGibbsianness and force the decay of correlations to be slow ([1], [4]). Applying these results allow us to establish a multifractal formalism of weak Gibbs measures associated to potentials of weak bounded variation ([3]). Furthermore, we establish a version of the local product structure (weak local product structure) for the invertible extension of ergodic weak Gibbs measures μ ([2]). About the decay of correlations of weak Gibbs equilibrium measures, polynomial upper bounds can be obtained for a class of functions which contains all piecewise Lipschitz functions ([4]), by clarifying the speed of uniform convergence of iterated transfer operators on compact sets excluding indifferent periodic points.

Report
(3results)
Research Products
(18results)