A Fractal Eigenvector

Abstract

The recursively-constructed family of Mandelbrot matrices $M_n$ for $n=1$, $2$, $\dots$ have nonnegative entries (indeed just $0$ and $1$, so each $M_n$ can be called a binary matrix) and have eigenvalues whose negatives $-\lambda =c$ give periodic orbits under the Mandelbrot iteration, namely $z_k=z_{k-1}^2+c$ with $z_0=0$, and are thus contained in the Mandelbrot set. By the Perron--Frobenius theorem, the matrices $M_n$ have a dominant real positive eigenvalue, which we call ${\rho }_n$. This article examines the eigenvector belonging to that dominant eigenvalue and its fractal-like structure, and similarly examines (with less success) the dominant singular vectors of $M_n$ from the singular value decomposition.

20 pages; 15 figures

References in corpus (1)

• Self-interlacing polynomials