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[matrix] Diff of /pkg/TODO
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Diff of /pkg/TODO

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revision 2124, Thu Mar 6 08:19:40 2008 UTC revision 2125, Fri Mar 7 07:58:26 2008 UTC
# Line 25  Line 25 
25    
26    For triangular matrices, more specifically make sure the four rules of    For triangular matrices, more specifically make sure the four rules of
27    "triangular matrix algebra" (Golub+Van Loan 1996, 3.1.8, p.93) are    "triangular matrix algebra" (Golub+Van Loan 1996, 3.1.8, p.93) are
28    fulfilled;  currently  <dtC> %*% <dtC> --> <dgC>    fulfilled; now(2008-03-06) ok for Csparse; not yet for <dtr> %*% <dtr>
29    
30  - "d" <-> "l" coercion for all "[TCR]" sparse matrices is really trivial:  - "d" <-> "l" coercion for all "[TCR]" sparse matrices is really trivial:
31    "d" -> "l" : drops the 'x' slot    "d" -> "l" : drops the 'x' slot

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