# FOCUS | numeric

#### Welcome!

I hope that someone out there finds this site interesting. Items posted here are not tutorials - but feel free to use them as such if you wish. I have tried to remain informal (assuming that most visitors won't be mathematicians) but have tried to keep my language precise and mathematically correct. In every case I explain what I'm doing so that any careful reader will be able to follow the logic if not the math.

What is not on this site...

• Any of the code I have written for clients.
• Any of my ideas for websites, implementations of technologies and anything that is valued intellectual property. You may do whatever you wish with any of the code, etc.

#### Site contents:

• home: Home sweet home. You're here now!
• items: These are examples of mathematics and data science work by me.
• else: Hmmm... Other stuff.

Math on this site is rendered with Math Jax and $$\LaTeX$$ . Below you should see some mathematical expressions. If Math Jax is working correctly they should look like math - and not a jumble of typesetting code. $$g \in \bigcup_{n=1}^{\infty} U_{n, \varepsilon} \ \therefore \ g \in C(x)$$ $$\| x \|_p = \left( \displaystyle\sum_{i=1}^n \vert x_i \vert^p \right)^{1/p}$$, $$\ \ \ A_{m,n} = \begin{pmatrix} a_{1,1} & a_{1,2} & \cdots & a_{1,n} \\ a_{2,1} & a_{2,2} & \cdots & a_{2,n} \\ \vdots & \vdots & \ddots & \vdots \\ a_{m,1} & a_{m,2} & \cdots & a_{m,n} \end{pmatrix}$$, $$\ \ \ \displaystyle\int_\Omega x \cdot f(x) \ dx = 1$$