[Numpy-tickets] [NumPy] #601: function for computing powers of a matrix

NumPy numpy-tickets@scipy....
Tue Oct 30 09:18:37 CDT 2007


#601: function for computing powers of a matrix
--------------------------+-------------------------------------------------
 Reporter:  LevGivon      |        Owner:  somebody
     Type:  enhancement   |       Status:  new     
 Priority:  normal        |    Milestone:  1.0.4   
Component:  numpy.linalg  |      Version:  devel   
 Severity:  normal        |   Resolution:          
 Keywords:                |  
--------------------------+-------------------------------------------------
Comment (by LevGivon):

 '' I suppose one could modify the proposed function to check
 whether the matrix is defective within an appropriate
 tolerance.''

 For the sake of comparison, Matlab's matrix exponentation mechanism
 apparently uses decomposition without checking for defectiveness (and
 encounters numerical issues when the matrix is defective). Octave returns
 nans and infinities when non-integer exponents are specified even for non-
 defective matricies.

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/601#comment:5>
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