# Christoph Champ Logo

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In case you are wondering what this site's logo (or Christoph Champ Logo / Sumi-e Lissajous curve) is all about, this article will attempt to explain it.

I have always been interested in geometry. This is especially true of symmetry. This is what I had in mind when I designed my logo for this site. It is actually just a Lissajous curve that has been transformed, using the principles of sumi-e, for an artistic effect.

## The mathematics behind the logo

In mathematics, a Lissajous curve is the graph of the system of parametric equations

x = A*sin(at + δ), y = B*sin(bt),

Below is an example of a Lissajous figure with δ = π/2, a = 9, b = 8. Next to it is a sumi-e rendition of this same Lissajous curve (created by Christoph Champ).

You can easily generate a Lissajous curve in Maple by executing the following commands:

```x1:= t->sin(9*t): y1:= t->sin(8*t):
plot({[x1(t), y1(t), t=0..2*Pi]});
```