# sierpinski platonic solids

Using the constants defined in this paper, I generated movies of Sierpinski Platonic solids:

# The Sprott Decoder

The Sprott Decoder is a piece of software I wrote that can be used to visualize some of the 3d quadratic and cubic type attractors mentioned in Strange Attractors: Creating Patterns in Chaos, specifically the ones with the prefix “I” or “J”.

I’ve used a slightly altered version to interpolate the points in this attractor to the second point after the current one:

# deforming geometric series

Yesterday I asked if there could be such a sequence of real numbers $\{a_{n}\}_{\infty}$ such that for all $n\in\mathbb{N}$, AGM$(a_{n},a_{n+1}) = 1/2^{n}$, and it turns out that the new sequence is just a linearly stretched version, and that had me wondering, in what cases are we aware of nonlinearly stretched geometric sequences:

The ordinary geometric sequence:
$\sum_{n=1}^{\infty} \frac{1}{2^{n}} = 1$

The exponential:
$\sum_{n=1}^{\infty} \frac{1}{2^{n}n!} = \sqrt{e}-1$

“Wahi” or “Upsilon” functions:
$\sum_{n=1}^{\infty} \frac{1}{2^{n}n^{n}} = \int_{0}^{1} \frac{dx}{2\sqrt{x^{x}}} = \Upsilon_{0}(1/2) =$ʍ$(1/2)-1$

The polylogarithm (in particular, the dilogarithm):
$\sum_{n=1}^{\infty} \frac{1}{2^{n}n^{2}} = Li_2(1/2)$

But there are lacunary monsters like the following:
$\sum_{n=1}^{\infty} \frac{1}{2^{n}3^{2^{n}}}$
That there are no present methods of evaluation for.

# automorphism groups of newton’s method fractals

This is just a stub. When I see things like this or this, I keep wondering about the automorphism groups of Newton’s method fractals.
Just as Kleinian group limit sets are the result of applying a transformation over and over again, Newton’s method limit sets are the result of applying Newton’s method over and over again on the complex plane. In some ways, Newton’s method also involves a curious sort of Indra’s Pearls effect. For instance, in these youtube videos:

It is remarkable how the bulbs seem to have ‘reflection’ to all other bulbs contained within. Moreover, each node where a bulb joins another bulb has the same arrangement of colors (roots) around it. I suppose that there is some group ཞ for a particular function $f(z)$ for which $f(z)$ = $f($$z)$

# my favorite discrete time dynamical system

Given a point in $\mathbb{R}^{3}$, the next point is:
$x_{n+1} = 2\cos(z_{n}-y_{n})$
$y_{n+1} = 2\sin(x_{n}-z_{n})$
$z_{n+1} = 7\cos(y_{n}-x_{n})$

You can see a high resolution visualization of this here:
http://owen.maresh.info.nyud.net:8080/vrungle-high.mpg

# gaps in zeta zeroes (attractor)

Using Odlyzko’s data (last file) for the nontrivial roots of the Riemann zeta function $\zeta(s)$, I constructed an attractor — origin is in upper right corner, x increases as you go across and y increases as you go down. (x values are current differences (between nontrivial roots), y values are next differences (between nontrivial roots))