[ublas] Question/request for matrix powers and other stuff

Subject: [ublas] Question/request for matrix powers and other stuff
From: Daryle Walker (darylew_at_[hidden])
Date: 2008-09-26 03:22:38

1.	I looked around at the Boost uBLAS documentation for this but I  
couldn't find it.  Is there a "pow" function or similar that can  
return a given integer power of a square matrix?  (It could use  
binary exponentiation to do its work.  The exponent could be a type  
given as a type-based template parameter and checked with traits.  If  
the exponent value is negative, then find the inverse of the matrix  
and work from there, generating an error of non-invertible matrices.)

2.	Is there a matrix type with Boolean elements?  I worked around  
that my making my own GF(2) representation type and using it with the  
uBLAS class templates.  Is using a type that doesn't represent real  
or complex numbers supported?  I wonder if there could be such GF(2)  
vector and matrix types, maybe the elements can be compacted into  
single bits.

(I'm developing a type that implement linear transformations of  
binary objects as matrices, so repeated applications of a particular  
transformation would be implemented as a power.  I originally tried  
to develop my own compact-bit vector and matrix class templates, but  
thought it was too much to test it and my main code, so I made a [non- 
compact] GF(2) class and wrapped uBLAS around that.)

-- 
Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT hotmail DOT com