> < ^ Date: Thu, 28 Feb 2002 13:33:39 +0100 (MET)
< ^ From: Thomas Haeberlen <thomas.haeberlen@gmx.net >
> ^ Subject: Question on "Extending the Character Table Library"

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Dear GAP Forum,

I have a problem with the Gap Character Table Library: according to the
Reference Manual, I should be able to save a computed character table to a
file(via "PrintToLib" and re-define it in the next session (via
"NotifyCharacterTable"). However this does not work for me. Here is an example of what I would
like to do:

g := ProjectiveSpecialLinearGroup( 4,3 );;
ct := CharacterTable( g );;
Display( ct);

The character table is then displayed after some time... a rather long time,
so I try a

PrintToLib( "psl_4_3" , ct );

which creates a file called "psl_4_3.tbl" in my home directory. Now I
thought that after doing a

> NotifyCharacterTable( "foo" , "path-from-tbl-dir-to-home-dir/psl_4_3" ,
[]);

I would get the character table back by saying

foo := CharacterTable( "foo" );

but instead I get

#W revision entry missing in "/path-from-tbl-dir-to-home-dir/psl_4_3.tbl"
fail

I must be missing something... but what?

Thanks in advance.

Thomas Haeberlen

PS: I am using Gap 4.2 with patches 1..8
PSS: I am attaching the file "psl_4_3.tbl", just in case...

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