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Happy New Year!  If you have a suspicious mind like me, you may think
that the fact that I am suddenly more efficient at getting out this
announcement is because I am one of the authors this month.  But I
can honestly say that I was (helpfully!) prodded into this by Brayton
Gray, another of this month's authors.  

There are 2 new papers this time, from GrayB and Hovey-Lockridge.  

                  Mark Hovey

New papers appearing on hopf between 11/30/09 and 1/7/10

1.
http://hopf.math.purdue.edu/cgi-bin/generate?/GrayB/Gray-Whitehead

On Generalized Whitehead Products

Brayton Gray

A symmetric monoidal product G o H is defined on the category of co-H
spaces that are either suspensions or simply connected, together with a
Whitehead product map G o H ---> G v H whose mapping cone is the product
G x H.  In particular, G o SX is equivalent to G ^ X. This generalizes
some work of Theriault and allows one to analyze the Whitehead product
structure of co-H spaces.

2.
http://hopf.math.purdue.edu/cgi-bin/generate?/Hovey-Lockridge/finite-dim

Homological dimensions of ring spectra
by Mark Hovey and Keir Lockridge

We define homological dimensions for S-algebras, the generalized
rings that arise in algebraic topology.  We compute the homological
dimensions of a number of examples, and establish some basic
properties.  The most difficult computation is the global dimension of
real K-theory KO and its connective version ko at the prime
2.  We show that the global dimension of KO is 1, 2, or 3,
and the global dimension of ko is 4 or 5.  
     
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