What is interesting in Physics

[Ha Le <ha@math.wayne.edu>]

Hi Ba'c A'i Vie^.t,
Thanks much for answering my question. I do need some time to digest what 
you wrote and besides, i would like to hear from the "pro".
   
  I personally, don't believe in any TOE ( Theory of everything)...

As i understand, "everything" here just mean a unification theory, it 
does not mean "everything" i.e the end of Physics. In this respect, is 
string theory has any chance? 


  The passion of strings was revived by John Schwartz   at Caltech and 
exactly atracted attention by explaining why the dimension is 10 or 26.
It was discovered that when a field theory is quantized, some troubles
emerge ( so called anomaly). In the mathematical terms, quantum anomalies
have origin in the index theorems. I will not go into details here.
 There is a possibility that the anomalies can have opposite sign and 
they can cancelled each other if the theory has more components. The 
multi-dimensional theories are one way to introduce multi-fields as 
components of an unique object. 

i'm not sure if i understand here, so you mean that istead of considering 
each "individual" anomaly, they consider a kind of moduli space of all 
anomalities by throwing in more dimensions?   

The way to go from a multi-dimensional 
theory to the usual 4-dim field theory is through a process called 
dimesion reduction. 

 Do you have any simple example of this "dimension reduction" process?


It is believed widely that duality is universal.( You can think of Jing-Jang as 
a very good and simple model for the world).

If i remember correctly, one of Hilbert's problem is to describe the 
so-called "universal duality" - I dont' really understand what it means, 
but it seems that he wanted a kind of axiommatic approach to duality 
phenomena so that for example if something is true, then we get for free its 
"duality" is also true !?

Btw, Can you explain the phenomenon "Cu+.c du+o+ng sinh a^m (and vise 
versa) " in terms of say, perhaps entropy? 
cheers!
Ha