Math Forum / Mathematics / Research / February 2010

I am studying "Basic Bicategories" by Tom Leinster
(arXiv:math/9810017v1). I have two questions:
1) Suppose that:
- m, m', n and n' are transformations;

Papers (1)-(6) continue the publication of AGT Volume 10 issue 1 and
papers (7)-(9) complete issue 1 of GT Volume 14.
Six papers have been published by Algebraic & Geometric Topology
(1) Algebraic & Geometric Topology 10 (2010) 87-136

Can anyone recommend a modern text, at a level suitable for an
undergraduate economics major, that describes the sort of textual
analysis that Mosteller and Wallace did of the Federalists papers in
the 1960's? (Given a text with two possible authors, and information

(Suggested by a Putnam problem).
A set X of real numbers is nowhere dense if every nonempty open
interval in R contains a nonempty open subinterval disjoint from X.
Let X and Y be countable nowhere dense sets of non-negative real

It would be highly appreciated if you could share this announcement
with your colleagues, students and individuals whose research is in
theoretical computing, complexity theory, algorithms, computational
science and related areas.

It was shown by Aharoni and Saphar that, if $E$ and $F$ are reflexive
Banach spaces, then the tensor product $E \otimes_{g_2} F$ is reflexive,
too.
Are there any other "canonical" Banach space tensor products that

Can we associated to every closed pointed salient convex cone C that
is contained in a Banach space V
a hyperplane H
which intersects each ray of C exactly once?

Would anybody remember the precise mathematical statement of the
problem written by John Nash (interpreted by Russell Crowe) on the
black board during his math lesson and that Alicia, his future wife,
tried to solve it ?

Draft paper submission deadline is extended: TMFCS-10, Orlando, USA
The 2010 International Conference on Theoretical and Mathematical Foundations
of Computer Science (TMFCS-10) (website: http://www.PromoteResearch.org) will
be held during 12-14 of July 2010 in Orlando, FL, USA.  ...

Contato: pcnetsecurity @ gmail.com
Assistncia TŽcnica
Prestamos assistncia tŽcnica nos computadores de sua empresa ou residncia, e tambŽm possu’mos uma equipe qualificada para fazer a manuten‹o no pr—prio local.
- Contratos de Suporte e Manuten‹o

I am interested in obtaining the factorization of f(z) = cos (z) - sin
(z). Thank you.

2nd CALL FOR PAPERS: Artificial Life XII
     The Twelfth International Conference
on the Synthesis and Simulation of Living Systems
   19th - 23rd August 2010, Odense, Denmark

I am interested in the following problem.  If B is a symmetric matrix,
and A is antisymmetric, find a square matrix X so that
BX-XB = A.
I can see how to solve it by diagonalizing B (but I need the eigenvalues

I have recently come across the paper by John Baez entitled "Kostant
on E8" where he shows that the e8 algebra can be expressed as a direct
sum of 31 8-dimensional Cartan algebras.
Some time ago I have noticed that the same is true of g2, that is it

Also available at http://math.ucr.edu/home/baez/week293.html
February 6, 2010
This Week's Finds in Mathematical Physics (Week 293)
John Baez