Title:  Galaxy formation: Some Problems and Some Answers

Abstract: Over the past ten years the basic theoretical framework for 
understanding galaxy formation has solidified.  The basic elements are: 
inflation, cold dark matter (CDM), vacuum energy, and dissipative gas dynamics.
Inflation produces small-amplitude fluctuations that grow by gravitational
instability.  Baryons fall into the dark matter potential wells, dissipate
their acquired gravitational energy, settle into cold, dense clumps at the
centers of dark matter halos, and form stars. However, some vexing problems
remain.  I will discuss a few of these problems and possible solutions 
including:

1) An inconsistency between the predicted galaxy luminosity function and
   the predicted zero point of the Tully-Fisher relation.

2) Why does the average star formation rate of the Universe decline rapidly    
    towards low redshift?

3) The prediction of a cuspy dark matter density profile when
   observations imply a dark matter core.