Ben Whale

Logitech mouse and Linux

Ben — Sat, 11 May 2013 03:58:30 +0000

Finally found a page which includes some instructions on how to get all those fancy buttons working on my Logitech mouse.

A weird little bug…

Ben — Thu, 09 May 2013 21:43:00 +0000

Yup. There is a weird little bug in numpy… sort of. You only need to watch out for it when subclassing numpy arrays (assuming that the subclasses you are using have avoided it.) Check out my stack overflow post about it. I’m not 100% sure, but it might just be a Python 2 thing.

librdmacm errors when using openmpi

Ben — Tue, 07 May 2013 23:29:27 +0000

This information can be found elsewhere, but I figured that it’s worth reposting. The bottom line here are errors that look like: librdmacm: Warning: couldn't read ABI version. librdmacm: Warning: assuming: 4 librdmacm: Fatal: unable to get RDMA device list -------------------------------------------------------------------------- [[13473,1],0]: A high-performance Open MPI point-to-point messaging module was unable to find any relevant …

An article that I meant to post to twitter… but it’s too late now.

Ben — Thu, 15 Nov 2012 03:27:44 +0000

http://www.sciencedaily.com/releases/2012/04/120425094352.htm

On level sets of the Lorentzian distance function

Ben — Tue, 13 Nov 2012 01:21:53 +0000

The paper in question quotes reference “[1]” a lot. Reference [1] of the paper is “Particle physics and inflationary cosmology“. A book for which some of the pages referenced are in the index or bibliography. I think the correct reference is “Global Lorentzian Geometry“. If you’ve stumbled here then no doubt we’re doing research on …

DBus tutorial

Ben — Thu, 06 Sep 2012 09:26:22 +0000

Well kind of.

evince + synctex support broke for me today

Ben — Thu, 06 Sep 2012 09:00:08 +0000

The offending line is line 50 in evince_forward_search. Change it to window.SyncView(tex_file, (line_number,1), int(time.time()), dbus_interface="org.gnome.evince.Window") and all should be well. I’m thinking about switching my tex editor to vim. If I do this I’ll provide a config file to connect the python dbus scripts behind evince_forward_search and evince_backward_search to vim.

ctypes, restype and arrays

Ben — Thu, 10 May 2012 00:50:43 +0000

I’ve been having some problems accessing, as python arrays, an array returned by C code via the ctypes module. The ctypes documentation is not great, but this is.

synctex + gedit + evince

Ben — Sun, 26 Jun 2011 22:29:03 +0000

Forward and backwards search for latex source and their compiled images is a must have feature for me.

Halmos – How to write mathematics – Executive Summary

Ben — Sun, 01 May 2011 10:36:12 +0000

Below is a summary of Halmos’ classic essay that has been tailored for myself. I hope it is of use to others. I have left out all detail and thus the list below is in no way a substitute for the article itself. Preface. What constitutes good mathematics exposition is subjective. There is no recipe …