

Tim Hsu 


(Spring 2017) 



(by Hazel Hsu at age 6) 
Hi. I'm a professor in the Department of Mathematics and
Statistics at San José State
University. Welcome to my new homepage at www.timhsu.net!
This semester (Fall 2018), I'm teaching:
You may have also come here looking for:
If you found this page while looking for something along the lines of:
http://www.math.sjsu.edu/~hsu/FOO
Then try the following URL:
http://www.timhsu.net/FOO
If I have everything set up correctly, that page should have exactly
the same content as what you were looking for. If not, try varying
upper and lower case in FOO; my new system here is casesensitive,
whereas the old one wasn't. If that doesn't work, please let me know
what you were looking for by email
at tim.hsu@sjsu.edu,
and I'll see what I can do to fix the problem.
Office: MacQuarrie Hall 419.
Phone: (408)9245071, fax (408)9245080.
Email: tim.hsu@sjsu.edu. (Note
that I no longer use my old email address hsu@math.sjsu.edu.
However, I'll probably leave these two sentences on this page in the
hope of attracting the attention of future Google searches for
hsu@math.sjsu.edu.)
Office hours: M 12:001:00, 2:003:00; W
1:003:00. Click here for full
Spring 2018 schedule.
Click on the pictures at the top of this page to
see a few more pictures (including a
Simpsonized version).
I'm the advisor of many of our students getting BA's in Math (the pure
option), so if you need advice on your undergraduate degree,
please contact me, and I can at
least put you in touch with someone who can help.
Click here
for more information on SJSU math advising, or more specifically,
advising for
undergraduate math majors at SJSU.
Other teaching things:
 How to minor or major
in math at SJSU, the very short version.
 Handouts on writing math in
paragraph style and writing
proofs (revised August 2008). The first handout is for anyone
learning to write up solutions to math problems in complete
sentences. The second is aimed at students who know a little bit of
linear algebra, but should be useful for anyone learning how to
write proofs, since it doesn't really rely on any knowledge of
linear algebra. (Someday, I want to turn the second handout into a
book; please contact me if
(a) you're a publisher, (b) you find the idea interesting, and (c)
you can figure out a way to charge less than $10 for it.)
 A related handout (taken from the proof notes) about how to give a lecture on
mathematics.
 Handout on how to do well
in college math, especially for beginning students. In three
words: Do your homework!
 Looking for an advisor for your master's thesis at SJSU? Check
out this list of master's and senior theses
I've advised at SJSU, Pomona College, and the University of
Michigan.
 Home pages for some classes I've taught in the past:
 Math 127 (Applied and industrial
algebra), Spring 2018.
 Math 131A (Introduction to
analysis), Spring 2018.
 Math 131B (Analysis II), Fall 2017.
 Math 108 (Introduction to proof),
Spring 2016.
 Math 32 (Multivariable
calculus), Fall 2015.
 Math 126 (Introduction to number
theory), Spring 2015.
 Math 42 (Discrete math), Fall 2014.
 Math 19 (Precalculus), Spring 2013.
 Math 129B (Linear algebra II),
Spring 2012.
 Math 128B (Abstract algebra II),
Spring 2011.
 Math 128A (Abstract algebra I), Fall
2010.
 Math 31 (Calculus II), Spring 2010.
 Math 112 (Vector calculus), Spring
2006.
 Math 10 (Mathematics for general
education), Spring 2004.
 Math 142 (Introduction to
combinatorics), Fall 2002.
 Math 129A (Linear algebra I), Spring
2002.
 My section of the AMP (Alliance for Minority
Participation) Summer Math
Intensive Academy, 2001.
 Pomona College, Math 145, Spring
20002001 (Hyperbolic geometry)
 Michigan Math Scholars Summer 1998:
Codes, ciphers, and secret messages
I'm also the SJSU Math Colloquium chair. Click here for current colloquium info.
If you're looking for information about the Center for Applied
Mathematics, Computation, and Statistics (CAMCOS), I have
completed my term as the Director of CAMCOS. Please contact the
current director, Slobodan
Simic, for more about CAMCOS.
My research interests are in various areas of discrete mathematics,
especially group theory, which is the mathematical study of symmetry
through abstract algebra. I am also interested in other topics in
algebra and combinatorics. More specifically, my interests include:
 Geometric group theory, especially groups of nonpositive
curvature;
 Combinatorics of partially ordered sets (extremal set theory);
 l^{2} invariants, like homology and cohomology,
which I gather falls under the buzzword of noncommutative geometry;
 Combinatorial game theory, including 0player games (cellular
automata);
 Sporadic finite simple groups, and related phenomena, like
Moonshine and Moufang loops; and
 Modular groups and braid groups of various types.
In the past, I've also been interested in lattices, knots, discrete
subgroups of Lie groups, automorphic forms and functions, ideas
related to the inverse Galois problem (e.g., dessins d'enfants) and
quantum computation.
If you want more details, here are my academic vitals.
 Curriculum vitae with annotated bibliography (includes links to
postscript/pdf preprints of many papers)
 Nicely formatted printable version of my CV: pdf. (Version without abstracts: pdf; version emphasizing discrete
math, for industry: pdf.)
A very old but still shameless selfpromotion! My research monograph,
Quilts: Central extensions, braid actions, and finite groups,
is available as Springer
Lecture Notes in Mathematics vol. 1731 (listing on
amazon.com, though now out of print).
Mailing address:
Tim Hsu
Department of Mathematics
San José State University
San José, CA 951920103
Last updated Aug 26, 2018