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The study of Julia sets gives a new and natural way to look at fractals. When mathematicians investigated the special class of Misiurewicz's rational maps, they found out that there is a Julia set which is homeomorphic to a well known…

Dynamical Systems · Mathematics 2020-01-14 Malte S. Hassler , Hua Qiu , Robert S. Strichartz

Fractals offer the ability to generate fascinating geometric shapes with all sorts of unique characteristics (for instance, fractal geometry provides a basis for modelling infinite detail found in nature). While fractals are non-euclidean…

Computational Geometry · Computer Science 2023-03-28 Ben Kenwright

The existence of a self similar Laplacian on the Projective Octagasket, a non-finitely ramified fractal is only conjectured. We present experimental results using a cell approximation technique originally given by Kusuoka and Zhou. A…

Spectral Theory · Mathematics 2018-01-25 Yiran Mao , Robert S. Strichartz , Levente Szabo , Wing Hong Wong

We investigate the iterative construction of discrete Laplacians on 2D square lattices, revealing emergent fractal-like patterns shaped by modular arithmetic. While classical 2222-style iterations reproduce known structures such as the…

Dynamical Systems · Mathematics 2026-03-16 Małgorzata Nowak-Kępczyk

We construct a surface that is obtained from the octahedron by pushing out 4 of the faces so that the curvature is supported in a copy of the Sierpinski gasket in each of them, and is essentially the self similar measure on SG. We then…

Analysis of PDEs · Mathematics 2020-07-15 Iancu Dima , Rachel Popp , Robert S. Strichartz , Samuel C. Wiese

This note introduces a result on the location of eigenvalues, i.e., the spectrum, of the Laplacian for a family of undirected graphs with self-loops. We extend on the known results for the spectrum of undirected graphs without self-loops or…

Optimization and Control · Mathematics 2015-06-09 Behcet Acikmese

We continue the study of constructing invariant Laplacians on Julia sets, and studying properties of their spectra. In this paper we focus on two types of examples: 1) Julia sets of cubic polynomials $z^3 + c$ with a single critical point;…

Dynamical Systems · Mathematics 2012-06-12 Calum Spicer , Robert S. Strichartz , Emad Totari

We present a new method to approximate the Neumann spectrum of a Laplacian on a fractal K in the plane as a renormalized limit of the Neumann spectra of the standard Laplacian on a sequence of domains that approximate K from the outside.…

Analysis of PDEs · Mathematics 2009-10-11 Tyrus Berry , Steven M. Heilman , Robert S. Strichartz

We show a norm convergence result for the Laplacian on a class of post-critically finite fractals with arbitrary Borel regular probability measure which can be approximated by a sequence of finite-dimensional graph Laplacians with…

Spectral Theory · Mathematics 2018-09-10 Olaf Post , Jan Simmer

A mathematical method for constructing fractal curves and surfaces, termed the $p\lambda n$ fractal decomposition, is presented. It allows any function to be split into a finite set of fractal discontinuous functions whose sum is equal…

Statistical Mechanics · Physics 2015-12-15 Vladimir Garcia-Morales

We consider Laplacians on $\Z^2$-periodic discrete graphs. The following results are obtained: 1) The Floquet-Bloch decomposition is constructed and basic properties are derived. 2) The estimates of the Lebesgue measure of the spectrum in…

Spectral Theory · Mathematics 2013-01-30 Andrey Badanin , Evgeny Korotyaev , Natalia Saburova

We study several variants of the classical Sierpinski Carpet (SC) fractal. The main examples we call infinite magic carpets (IMC), obtained by taking an infinite blowup of a discrete graph approximation to SC and identifying edges using…

Analysis of PDEs · Mathematics 2019-02-12 Eric Goodman , Chun-Yin Siu , Robert S. Strichartz

We study the spectral decomposition of the Laplacian on a family of fractals $\mathcal{VS}_n$ that includes the Vicsek set for $n=2$, extending earlier research on the Sierpinski Gasket. We implement an algorithm [24] for spectral…

Analysis of PDEs · Mathematics 2016-04-06 Sarah Constantin , Robert S. Strichartz , Miles Wheeler

In this paper we explore by means of the method of Lagrangian descriptors the Julia sets arising from complex maps, and we analyze their underlying dynamics. In particular, we take a look at two classical examples: the quadratic mapping…

Dynamical Systems · Mathematics 2020-07-15 Víctor J. García-Garrido

We present a new approach to the theory of k-forms on self-similar fractals. We work out the details for two examples, the standard Sierpinski gasket and the 3-dimensional Sierpinski gasket, but the method is expected to be effective for…

Classical Analysis and ODEs · Mathematics 2012-06-07 Skye Aaron , Zach Conn , Robert Strichartz , Hui Yu

This paper introduces the concept of Fractal Frenet equations, a set of differential equations used to describe the behavior of vectors along fractal curves. The study explores the analogue of arc length for fractal curves, providing a…

General Mathematics · Mathematics 2024-04-15 Alireza Khalili Golmankhaneh , Palle E. T. Jørgensen , Dimiter Prodanov

This article surveys the analytic aspects of the author's recent studies on the construction and analysis of a "geometrically canonical" Laplacian on circle packing fractals invariant with respect to certain Kleinian groups (i.e., discrete…

Probability · Mathematics 2021-05-07 Naotaka Kajino

In this paper, we propose a novel pseudospectral method to approximate accurately and efficiently the fractional Laplacian without using truncation. More precisely, given a bounded regular function defined over $\mathbb R$, we map the…

Numerical Analysis · Mathematics 2019-08-27 Jorge Cayama , Carlota M. Cuesta , Francisco de la Hoz

We study the spectral zeta functions of the Laplacian on fractal sets which are locally self-similar fractafolds, in the sense of Strichartz. These functions are known to meromorphically extend to the entire complex plane, and the locations…

Spectral Theory · Mathematics 2018-05-04 Joe P. Chen , Alexander Teplyaev , Konstantinos Tsougkas

It is known that the small eigenvalues of the Laplacian of a Riemann surface close to the boundary of the modular space can be well approximated by the eigenvalues of the discrete Laplacian on a certain graph coming from the pair of pants…

Spectral Theory · Mathematics 2026-04-30 Alena Erchenko , Dmitry Jakobson , Allison Tsypin
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