[GAP Forum] sine cosine decomposition

[sazzad at pdx.edu]

Hi,
Is there anyone can decompose a 9X9 matrics to its sine cosine decomposition or
let me give some hints in this regards in GAP.
Thanks,
sazzad

Quoting Stefan Kohl <kohl at mathematik.uni-stuttgart.de>:

> Dear Forum,
>
> This message is only relevant for those of you who use the RCWA package:
>
> With the recent update from GAP 4.4.5 to GAP 4.4.6, some code which was
> formerly misplaced in RCWA has been moved to the main GAP library.
>
> Former versions of RCWA (<= 1.2.1) still contain that code, and trying
> to load them in GAP 4.4.6 (or later) will yield an error message,
> since the respective variables
>
>      PadicValuation
>      EpimorphismFromFreeGroup
>      Float
>      IsFloat
>
> are now already defined in the library.
>
> The remedy is to update to the recent version 1.2.2 of RCWA of
> September 2, which does no longer contain the code which has been moved
> into the library.
>
> Apologies for any inconveniences,
>
>      Stefan Kohl
>
> ---------------------------------------------------------------------------
> Stefan Kohl
> Institut für Geometrie und Topologie
> Pfaffenwaldring 57
> Universität Stuttgart
> 70550 Stuttgart / Germany
>
> E-mail: kohl at mathematik.uni-stuttgart.de
> Web:    http://www.cip.mathematik.uni-stuttgart.de/~kohlsn/
> ---------------------------------------------------------------------------
>
>
>
>
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