On my mathematics blog I'm trying an A to Z run, writing one essay for some mathematical topic for each letter of the (English) alphabet. The start of the series was A, for abacus, per a reader request.

nebusresearch.wordpress.com/20

I apologize for the delay in following up. My second A to Z essay, on Buffon's Needle, is up at nebusresearch.wordpress.com/20

This one is also based on a reader request, from Peter Mander of the carnotcycle.wordpress.com thermodynamics blog.

The third of my A to Z essays came out Tuesday: Category Theory, as explained by a person who's just knowledgeable enough of the subject to know he shouldn't be writing an essay about category theory.

nebusresearch.wordpress.com/20

The fourth topic asked for in my A-to-Z this year was Differential Equations. I had some fun thinking about what they are and why they're interesting.

nebusresearch.wordpress.com/20

I got asked to say something about encryption schemes for the A-to-Z and did my best to say things that weren't too wrong.

nebusresearch.wordpress.com/20

My series got up to the letter F and, by several requests, Fourier series. My unstated challenge in this: see how far I could go without writing 'sine' or 'cosine' at all.

nebusresearch.wordpress.com/20

For the letter G: Green's Function. Also, I learn how much I don't know the actual rules about what LaTeX you can do in a free Wordpress blog.

nebusresearch.wordpress.com/20

The letter H for this season's A-to-Z gave me a chance to dip into mathematical physics. It's the Hamiltonian.

nebusresearch.wordpress.com/20

I took a couple pages from an analysis book for the next of my A-to-Z essays: the Infimum.

nebusresearch.wordpress.com/20

Is it possible to write about Julia Sets without including any pictures? Of course. Is it wise? This is a hard question.

nebusresearch.wordpress.com/20

And in my A-to-Z ... I got asked to explain linear programming. I can give it a try at least.

nebusresearch.wordpress.com/20

The letter 'M' brought my A-to-Z for the year to martingales, because the other request was the Mittag-Leffler function and I couldn't think of any way to explain *that*.

nebusresearch.wordpress.com/20

A Mastodon instance for maths people. The kind of people who make $$\pi z^2 \times a$$ jokes. Use $$ and $$ for inline LaTeX, and $ and $ for display mode.