comments on ublas

From: boost (boost_at_[hidden])
Date: 2001-11-20 05:39:56

Dear All,

I'm currently reading the documentation of ublas
and would like to send some comments.

-> doc/expression.htm
   "A Scalar Expression is an expression convertible to a builtin type."
   I'd like to  use scalar types / matrix elements which are (currently?) 
   not a builtin C++ types, like interval<..> or MyTypeWhichBehavesLikeScalar.
   
-> value type
   In my own matrix package I have defined a norm_type, since the type
   of the norm of a complex matrix is real. 
   In addition, one should take into account,
   that the type of an eigen value of an hermitean is again real.
   This gets interesting once one tries to write a generic eigen value
   routine. E.g., I have written a jacobi algorithm which works for arbitrary
   hermitean matrices that avoids uneccessary complex operations and works
   even for more complicated 'scalar types'.

-> op(A) * op(B)
   in addition to op= A, A^T, A^H i would like to have A^c,
   i.e. complex conjugated Matrices, since I need to evaluate
   A * B^c.

Once I manage to get the sources I'll continue.

Best wishes,
Peter