Monthly Archives: March 2013

New introduction to SciPy

The Python stack for scientific computing is more modular than say R or Mathematica. Python is a general-purpose programming language that has libraries for scientific computing. R and Mathematica are statistical and mathematical programming languages that have general-purpose features. The

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Posted in Python

Putting people in boxes

When I was in high school I had a conversation with a singer, a man with an incredible range. I was sitting at a piano, and he demonstrated that he could sing notes well below the bass clef. Then he

Posted in Uncategorized

Abelian consulting and Lévy consulting

Eric Jonas once asked me on Twitter whether I was an Abelian consultant. The pun is an allusion to Abelian groups, groups in which the group operation commutes. No, I’m not an Abelian consultant. I don’t have a regular commute.

Posted in Business, Math

Test post

Nothing to see here. Move along. …

Posted in Uncategorized

Blog changes

I’m about to make some changes to my blogging software. If all goes well, you’ll just notice a different theme. If something goes wrong, come back a little later or send me a note. Thanks.

Posted in Uncategorized

Appreciation for plain text

My attitude toward plain text files:

Posted in Computing

Preparing for Google Reader going away

As you’ve probably heard, Google has announced that they’re discontinuing Google Reader on July 1. Most of you who subscribe to this blog use Google Reader or use an RSS reader that depends on Google’s Feedfetcher. Here’s a snapshot from

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Posted in Computing

A web built on LaTeX

The other day on TeXtip, I threw this out: Imagine if the web had been built on LaTeX instead of HTML … Here are some of the responses I got: It would have been more pretty looking. Frightening. Single tear

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Posted in Software development, Typography

Tie dye and elliptic functions

I was watching one of Erik Meijer’s videos on functional programming today and it occurred to me that the tie dye shirt he was wearing looked a lot like an image from a recent blog post. Here’s the image from

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Interview with Sacha Chua

I spoke with with Sacha Chua last week. We talked about entrepreneurship, Emacs, having eclectic interests, delegation, and more. J: I ran into you by searching on Emacs topics. When I look at your blog, I see that you do

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Posted in Business

Was Betteridge right?

Betteridge’s law says Any headline which ends in a question mark can be answered by the word no. If Betteridge was right, then the answer to my headline question should be no, in which case Betteridge was wrong. But Betteridge

Posted in Uncategorized

An incomplete post about sphere volumes

This is an incomplete blog post. Maybe you can help finish it. One of the formulas I’ve looked up the most is the volume of a ball in n dimensions. I needed it often enough to be aware of it,

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Posted in Math

RSS readers on Linux

This afternoon I asked on UnixToolTip for suggestions of RSS readers on Linux. Here are the suggestions I got, in order of popularity. Liferea (Linux desktop) newsbeuter (Terminal-based. See installation notes) Akregator (KDE) Brief (Firefox plugin) rss2email (email) Tiny Tiny

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Posted in Uncategorized

That makes it invertible

How can you know when a matrix is invertible? Here’s a video from a college friend of mine that answers the question.

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Posted in Math

Five post on computing pi

In honor of Pi Day, here are five posts I’ve written on calculating pi. Oldest series for pi Calculating pi with AGM and mpmath Ramanujan pi approximation Algorithm for pi world records A Ramanujan series for calculating pi

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Posted in Math