Changes between Initial Version and Version 1 of Ticket #15712


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Timestamp:
01/23/14 01:30:27 (8 years ago)
Author:
ppurka
Comment:

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  • Ticket #15712 – Description

    initial v1  
    2525}}}
    2626''Sage's determinant() already uses PARI over Z/nZ for n less than the machine word size; it would be trivial to adapt it to work also over the reals.''
     27
     28According to Dima, the fix should be:
     29
     30''Is the default choice of the algorithm the right one?
     31One can see that ''
     32{{{
     33sage: A.determinant(algorithm="hessenberg")
     3416801.7979988558
     35}}}
     36''is quite good...  ''
     37
     38''
     39Sage computes det() by computing charpoly(0), too... The division-free algorithm is obviously meant for more general setting of rings, not fields. I don't know why it was made default here, perhaps just an oversight.''