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Motivated by a uniform boundedness conjecture of Morton and Silverman, we study the graphs of pre-periodic points for maps in three families of dynamical systems, namely the collections of rational functions of degree two having a periodic…

Dynamical Systems · Mathematics 2024-04-02 Tyler Dunaisky , David Krumm

We show that the set of periods of an automorphism of the affine plane defined over a $p$-adic field is bounded above by a constant independent from the automorphism. We deduce from this result a new proof in arithmetic dynamics of the…

Number Theory · Mathematics 2009-09-29 Sandra Marcello

For endomorphisms of projective varieties, we prove that the arithmetic degree of a point with Zariski dense orbit must be a cohomological Lyapunov multiplier of the dynamical system. We will apply our result to deduce a corollary towards…

Dynamical Systems · Mathematics 2025-07-24 Jiarui Song , Junyi Xie , She Yang

We study arithmetic degree of a dominant rational self-map on a smooth projective variety over a function field of characteristic zero. We see that the notion of arithmetic degree and some related problems over function fields are…

Algebraic Geometry · Mathematics 2017-03-02 Yohsuke Matsuzawa , Kaoru Sano , Takahiro Shibata

We consider the space of degree $n\ge 2$ rational maps of the Riemann sphere with $k$ distinct marked periodic orbits of given periods. First, we show that this space is irreducible. For $k=2n-2$ and with some mild restrictions on the…

Dynamical Systems · Mathematics 2014-01-21 Igors Gorbovickis

Let $X$ be a $\mathbb{Q}$-factorial klt projective variety admitting an int-amplified endomorphism $f$, i.e., the modulus of any eigenvalue of $f^*|_{\text{NS}(X)}$ is greater than $1$. We prove Kawaguchi-Silverman conjecture for $f$ and…

Algebraic Geometry · Mathematics 2024-08-02 Sheng Meng , Guolei Zhong

Let F : P^N --> P^N be a dominant rational map. The dynamical degree of F is the quantity d_F = lim (deg F^n)^(1/n). When F is defined over a number field, we define the arithmetic degree of an algebraic point P to be a_F(P) = limsup…

Number Theory · Mathematics 2012-09-06 Joseph H. Silverman

Motivated by Lang-Vojta's conjecture, we show that the set of dominant rational self-maps of an algebraic variety over a number field with only finitely many rational points in any given number field is finite by combining Amerik's theorem…

Algebraic Geometry · Mathematics 2020-06-17 Ariyan Javanpeykar , Junyi Xie

We classify birational maps of projective smooth surfaces whose non-critical periodic points are Zariski dense. In particular, we show that if the first dynamical degree is greater than one, then the periodic points are Zariski dense.

Algebraic Geometry · Mathematics 2015-11-03 Junyi Xie

There are three aims of this note. The first one is to report some advances around the dynamical Mordell-Lang (=DML) conjecture. Second, we generalize some known results. For example, the Dynamical Mordell-lang conjecture was known for…

Number Theory · Mathematics 2023-07-28 Junyi Xie

We prove the existence of the arithmetic degree for dominant rational self-maps at any point whose orbit is generic. As a corollary, we prove the same existence for \'etale morphisms on quasi-projective varieties and any points on it. We…

Algebraic Geometry · Mathematics 2025-05-15 Yohsuke Matsuzawa

In this paper we first note a result of birational automorphisms with bounded degree of projective varieties related with the Zariski dense orbit conjecture (ZDO) and the Zariski density of periodic points. Next, we give a reduced result of…

Algebraic Geometry · Mathematics 2023-12-22 Sichen Li

In this paper, we study arithmetic dynamics in arbitrary characteristic, in particular in positive characteristic. We generalise some basic facts on arithmetic degree and canonical height in positive characteristic. As applications, we…

Dynamical Systems · Mathematics 2021-07-09 Junyi Xie

Let k be an algebraically closed field of characteristic 0, let X=P^1\times A^N and let f be a rational endomorphism of X given by (x,y)--->(g(x), A(x)y), where g is a rational function, while A is an N-by-N matrix with entries in k(x). We…

Number Theory · Mathematics 2018-03-13 Dragos Ghioca , Junyi Xie , with an appendix written by Michael Wibmer

Let $X$ be a variety defined over a number field and $f$ be a dominant rational self-map of $X$ of infinite order. We show that $X$ admits many algebraic points which are not preperiodic under $f$. If $f$ were regular and polarized, this…

Algebraic Geometry · Mathematics 2010-07-12 Ekaterina Amerik

We prove, for the canonical height defined by Silverman [15] on monomial maps, the existence of effective lower bounds for heights of points with Zariski dense orbit, for cases with endomorphisms induced by matrices with real Jordan form.

Number Theory · Mathematics 2019-01-15 Jorge Mello

We prove the Morrison-Kawamata cone conjecture for klt Calabi-Yau pairs in dimension 2. That is, for a large class of rational surfaces as well as K3 surfaces and abelian surfaces, the action of the automorphism group of the surface on the…

Algebraic Geometry · Mathematics 2019-12-19 Burt Totaro

Let f : X --> X be a dominant rational map of a projective variety defined over a global field, let d_f be the dynamical degree of f, and let h_X be a Weil height on X relative to an ample divisor. We prove that h_X(f^n(P)) << (d_f + e)^n…

Dynamical Systems · Mathematics 2013-10-01 Shu Kawaguchi , Joseph H. Silverman

We prove that dynamical degrees of rational self-maps on projective varieties can be interpreted as spectral radii of naturally defined operators on suitable Banach spaces. Generalizing Shokurov's notion of b-divisors, we consider the space…

Algebraic Geometry · Mathematics 2021-05-12 Nguyen-Bac Dang , Charles Favre

Let K be a number field, let f: P_1 --> P_1 be a nonconstant rational map of degree greater than 1, let S be a finite set of places of K, and suppose that u, w in P_1(K) are not preperiodic under f. We prove that the set of (m,n) in N^2…

Number Theory · Mathematics 2012-03-09 Pietro Corvaja , Vijay Sookdeo , Thomas J. Tucker , Umberto Zannier