GiNaC/doc/tutorial ginac.texi

[Christian Bauer]

Update of /home/cvs/GiNaC/doc/tutorial

Modified Files:
	ginac.texi 
Log Message:
degree(), ldegree(), coeff(), lcoeff(), tcoeff() and collect() can now
be used with constants and indexed expressions as well, so you can use
it to collect by powers of Pi or find the coefficient of gamma~0.
Limitations: 
 - it only works with symbols, constants and indexed expressions;
   trying to find the coefficient of, e.g., "x^2" or "x+y" won't work 
 - it does not know about dummy index summations; the coefficient of
   gamma~0 in p.mu*gamma~mu should be p.0 but is returned as 0   
 - using the functions on elements of noncommutative products might
   return wrong or surprising results