My papers, preprints and talks.
I am a Managing Editor of Homology, Homotopy and Applications.
Here are some photos from trips I have been on; I also have a Google+ page.
Contact information is below.
Research 
My research interests include algebraic topology
(especially stable homotopy theory and model categories),
derived categories,
modular representation theory,
mathematical physics (quantum gravity),
algebraic and scientific computation,
and category theory (especially higher categories).
Research groupDan Christensen (faculty)
Martin Frankland
(postdoc, 20132015) 
What's this? 
I am also accepting applications for a postdoctoral fellow in Homotopy Theory, to start roughly July 1, 2014. I will also consider applications in other areas that I work on.
I encourage eligible people in topology or physics to apply for an NSERC Postdoctoral Fellowship, an NSERC Banting Postdoctoral Fellowship (domestic and international applicants eligible), any other NSERC postdoc, an NSF PDF (e.g. a International Research Fellowship Program postdoc, or a Mathematical Sciences Postdoctoral Research Fellowships or a Distinguished International Postdoctoral Research Fellowship), or similar to be held at Western.
The Canadian Government has many scholarships and fellowships that are available for people from many different countries.
Recent Teaching 
Summer 2014  Representation Theory, Math 9140a. 
Winter 2014  Linear Algebra I, Math 1600b. 
Fall 2013  Linear Algebra I, Math 1600a. 
Algebraic Topology, Math 4152a/9052a.  
Summer 2012  Representation Theory, Math 9140a. 
Fall 2011  Algebraic Topology, Math 4152a/9052a. 
Winter 2011  Algebraic Topology II, Math 9152b. 
Other 
The Hopf archive
of research papers in topology.
The Front for the xxx Mathematics
Archive. Direct to the xxx archive.
The Ktheory archive.
MathSciNet, which contains
searchable reviews of almost all mathematics publications and many
physics publications as well.
SAGE is a wonderful program which interfaces to Magma, Maple, Mathematica and MATLAB, and the free programs Axiom, GAP, GP/PARI, Macaulay2, Maxima, Octave, and Singular. It is freely available and open source. Dave Rusin's Mathematics Essays, and his article about algebraic topology. If you find math fun, consider becoming a math major. Talk to me or anyone else in the department if you're curious. A java calculator that performs exact computation with the constructable reals, using a java library. The Rainbow Cinemas at the Galleria. Some thoughts on investment strategies. 

Contact information 
Dan Christensen
Department of Mathematics
The University of Western Ontario
London, Ontario N6A 5B7
Canada
Office phone: (519) 6612111 x86530
Fax: (519) 6613610 (include my full name)