Fwd: Fwd: sympow data files
William Stein
---------- Forwarded message ----------
From: Mark Watkins <wat...@maths.usyd.edu.au>
Date: Mon, Jul 21, 2008 at 7:56 AM
Subject: Re: Fwd: sympow data files
To: William Stein <wst...@gmail.com>
William Stein wrote:
> ---------- Forwarded message ----------
> From: Timothy G Abbott <tab...@mit.edu>
> Date: Mon, Jul 21, 2008 at 2:18 AM
> Subject: sympow data files
>
> The sage sympow spkg contains various data files in the src/datafiles/
> directory, but there doesn't seem to be a script handy that generates
> them using "sympow -new_data" with the appropriate arguments. Trying
> various random arguments to new_data documented by "sympow -help", I
> don't seem to get the same data files.
>
> Is there a script somewhere or list of arguments that I use to
> generate the data files included in the SAGE distribution of sympow?
>
> -Tim Abbott
Most of the included .txt data files are "dumbed-down" versions of the usual
data files so as to compute just the modular degree and the analytic rank.
They have less precision than the full generated files; I think it is 106
bits for the modular degree and 53 bits for the analytic rank. SYMPOW should
create the .bin from the .txt the first time it is needed.
[The .bin have a fixed endian-ness, which is why there are the .txt files.]
The .txt files themselves were created once (using the right PARI command,
but to lower precision than usual), but I don't recall what parameters were
chosen to do this. The param_data file should allow me to determine this,
though I might have to change the standard*.gp files also.
===
Mark Watkins
wat...@maths.usyd.edu.au
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org