0.8.1 (<date>)
* 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.
+ be used with constants, functions and indexed expressions as well, so you
+ can use it to collect by powers of Pi or sin(x), or to find the coefficient
+ of gamma~0.
Limitations:
- - it only works with symbols, constants and indexed expressions;
+ - it only works with symbols, constants, functions 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
+ - using coeff(), tcoeff(), lcoeff() or collect() on elements of
+ noncommutative products might return wrong or surprising results
* Added preliminary (re)implementations of color and clifford classes.
* simplify_indexed(): contraction of symmetric and antisymmetric tensors
is zero.