activity
20202025
most citedArcsine law for random dynamics with a core

5 citations · 13 across the 9 of their papers we have counts for

collaborators

9 papers

math.DS2025

Finitude of physical measures for Markovian random maps

Pablo G. Barrientos, Dominique Malicet, Fumihiko Nakamura +2

We study the finiteness of physical measures for skew-product transformations associated with discrete-time random dynamical systems driven by ergodic Markov chains. We develop…

math.DS2023

Invariant measures for random piecewise convex maps

Tomoki Inoue, Hisayoshi Toyokawa

We show the existence of Lebesgue-equivalent conservative and ergodic -finite invariant measures for a wide class of one-dimensional random maps consisting of piecewise convex m…

math.OA2022★ 1 cited

Topological entropy for countable Markov shifts and Exel--Laca algebras

Yuta Michimoto, Yushi Nakano, Hisayoshi Toyokawa +1

We show that the (Gurevich) topological entropy for the countable Markov shift associated with an infinite transition matrix coincides with the non-commutative topological entr…

math.DS2022★ 1 cited

Finitude of physical measures for random maps

Pablo G. Barrientos, Fumihiko Nakamura, Yushi Nakano +1

For random compositions of independent and identically distributed measurable maps on a Polish space, we study the existence and finitude of absolutely continuous ergodic stationar…

math.DS2022★ 5 cited

Arcsine law for random dynamics with a core

Fumihiko Nakamura, Yushi Nakano, Hisayoshi Toyokawa +1

In their recent paper [8], G.Hata and the fourth author first gave an example of random iterations of two piecewise linear interval maps without (deterministic) indifferent periodi…

math-ph2021

Stability of energy landscape for Ising models

Bruno Hideki Fukushima-Kimura, Akira Sakai, Hisayoshi Toyokawa +1

In this paper, we explore the stability of the energy landscape of an Ising Hamiltonian when subjected to two kinds of perturbations: a perturbation on the coupling coefficients an…

math.DS2021★ 3 cited

Lyapunov exponents for random maps

Fumihiko Nakamura, Yushi Nakano, Hisayoshi Toyokawa

It has been recently realized that for abundant dynamical systems on a compact manifold, the set of points for which Lyapunov exponents fail to exist, called the Lyapunov irregular…

math.DS2021★ 1 cited

Random invariant densities for Markov operator cocycles and random mean ergodic theorem

Fumihiko Nakamura, Hisayoshi Toyokawa

In the present paper, we consider random invariant densities and the mean ergodic theorem for Markov operator cocycles which are applicable to quenched type random dynamical system…

math.DS2020★ 2 cited

Mixing and observation for Markov operator cocycles

Fumihiko Nakamura, Yushi Nakano, Hisayoshi Toyokawa

We consider generalized definitions of mixing and exactness for random dynamical systems in terms of Markov operator cocycles. We first give six fundamental definitions of mixing f…