Axel Harvey
Sunday 21 February 2016, 07:39I would like to say a few words about my close friend Axel Harvey, who I'm informed died yesterday.
The Pudding Fallacy
Sunday 27 December 2015, 11:17My text for today is from Pink Floyd (Another Brick in the Wall, part II): "If you don't eat your meat, you can't have any pudding!" I'd like to talk about the fallacy embedded in that statement. It's related to many well-known fallacies, but I haven't been able to find an existing name that applies specifically to this fallacy in this form without mixing it up with other things. So I'd like to give it a new name: let this be known as the fallacy of the Pudding.
LaTeXで文章の空白の植字をしましょう
Thursday 10 December 2015, 13:09日本語が分かっても、時々英語で植字をしなければならないです。 英語では文章と言葉の中で、いつも空白あります。 LaTeXを使えば、もしかしたら文章と言葉の空白が難しいです。 今日本件の勉強をしましょう。
これはTeX & LaTeX Advent Calendar 2015に僕の寄贈です。
Mountain-climbing addresses for code lines
Wednesday 25 November 2015, 03:59I found an interesting problem while working on a test case generator for the Tsukurimashou Project. The thing is that I'd like to assign an identifying code, which I will call an address, to each line of code in a code base. It's to be understood that these addresses have nothing to do with machine memory addresses, and they need not be sequential; they are just opaque entities that designate lines of code. Anyway, I would like lines of code to keep the same addresses, at least probabilistically, when the program is modified, so that when I collect test information about a line of code I can still keep most of it after I update the software.
Notes on notes on the plane
Sunday 2 August 2015, 04:09I have posted a detailed set of notes (PDF file) describing the theory behind my Black Swan Suite, detailing the endless chase of Elmer and Daffy across Penrose, pinwheel, and other nonperiodic tilings of the plane. Fans of music and computational geometry may find the document interesting. At the very least, it was fun to typeset.
Matthew, Rued Langgaards Vej 7, versus the Appliances
Wednesday 31 December 2014, 13:16It's New Year's Eve in Copenhagen, and time for another update.
lilypond-bookとLaTeXで音楽の植字
Friday 5 December 2014, 23:15数学と理学ではLaTeXが有名です。 論文を書ければいつもLaTeXを使っています。 でもLaTeXではいろいろな文書ができます。 今日LaTeXとlilypond-bookで音楽の書くことを見ましょう。
![[音楽]](https://ansuz.sooke.bc.ca/images/2014-12/20141206-music.png)
これはTeX & LaTeX Advent Calendar 2014に僕の寄贈です。
New apartment
Sunday 2 November 2014, 02:07As I start writing this, it is the evening of November 1 and I am sitting in my new apartment on Hallandsgade, Amagerbro, Copenhagen. It'll probably be the 2nd before I can post it, because I don't have the Net here. It sure looks like Rabbi Schlomo Yitschaki was dead right about the tzaraath of houses. Now I kind of want to read the rest of his many volumes of commentaries on Jewish religious law.
Cycle-maximal triangle-free graphs
Thursday 30 October 2014, 12:16In January of 2011, I had recently arrived at the University of Manitoba to work as a postdoc with Stephane Durocher. One of the first things he asked me to do was find out how many cycles there are in an n-dimensional hypercube graph, for general n. At the time, he and I both assumed that that meant spending maybe half an hour in the library looking up the answer.
Since then it's been more than three years; thousands of lines of computer code and months of CPU time; we added two more co-authors; we didn't solve the original problem, and didn't completely solve the other problem that we ended up working on, either; but here's a journal paper, anyway, and I think it's pretty interesting. The official definitive version will be free to access until mid-December and then will go behind Elsevier's paywall; the authors' accepted manuscript on arXiv is permanently accessible.
Read the paper if you're interested in the math details; in this entry I'm going to try to tell the story behind the paper, in relatively non-mathematical terms. I'm hoping it'll be of interest to my Web log readers and give you some idea, because I often get asked this, of what I actually do at work.
Days since last Biblical plague: 0
Wednesday 15 October 2014, 11:49Every time I think I've seen it all with regard to Danish excuses, this place surprises me. Today's excuse is tzaraath.
