> < ^ Date: Wed, 10 Apr 1996 21:20:00 +0100 (MET)
> < ^ From: Martin Schoenert <martin.schoenert@math.rwth-aachen.de >
^ Subject: BUGFIX 07 (DANGEROUS problem in 'CharTable( "ONM5" )')

This mail contains a bugfix for a dangerous problem in GAP 3.4.3.
*You should apply this bugfix as soon as possible*.
The problem is that 'CharTable( "ONM5" )' does not return the table
of the 5th maximal of the O'Nan group, but the table of the 13th
maximal of the Suzuki group (both have structure (3^2:4xA6).2).

HOW TO APPLY

The problem is a dangerous problem, because it may cause a computation
to produce incorrect results without a warning. Thus the bugfix has
high priority, and we recommend that you apply it as soon as possible.

Go to the GAP directory (the directory with the 'lib/' subdirectory),
name this mail 'bugfix07.dif', and issue the command:

patch -p0 < bugfix07.dif

This workaround changes only the character table library. Thus you need
not recompile the GAP kernel.

VERSION

GAP 3.4.3.0

DESCRIPTION

'CharTable( "ONM5" )' does not return the table of the fifth maximal of
the O'Nan group, but the table of the 13th maximal of the Suzuki group
(both have structure (3^2:4xA6).2).

CORRECT BEHAVIOUR

gap> C := CharTable( "ONM5" );;
gap> Set( List( C.irreducibles, chi -> chi[1] ) );
[ 1, 2, 8, 9, 10, 16, 18, 20, 40, 64, 72, 80 ]

COMMENT

Note that 'CharTable( "(3^2:4xA6).2" )' returns the table of the
13th maximal of the Suzuki group.

PATCH

Prereq: 3.47.1.2
--- tbl/ctlist.tbl      1995/01/16 09:10:09
+++ tbl/ctlist.tbl      1996/03/21 14:09:36
@@ -2,11 +2,14 @@
 ##
 #A  ctlist.tbl                  GAP table library               Thomas Breuer
 ##
-#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
+#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
 ##
 #Y  Copyright 1990-1992,  Lehrstuhl D fuer Mathematik,  RWTH Aachen,  Germany
 ##
 #H  $Log: 1.html,v $
 #H  Revision 1.2  2004/04/21 15:06:18  felsch
 #H  Corrected links in the Forum Archive pages.   VF
 #H
 #H  Revision 1.1.1.1  2004/04/20 13:39:30  felsch
 #H  The final GAP-Forum archive until 2003.
 #H
 #H  Revision 1.5  2003/06/12 19:20:33  gap
 #H  Further update. AH
 #H
 #H  Revision 1.4  2003/06/12 17:28:25  gap
 #H  Address updates by JN. AH
 #H
 #H  Revision 1.3  1997/08/15 11:19:33  gap
 #H  New forum setup. AH
 #H
 #H  Revision 1.2  1997/04/24 15:32:47  gap
 #H  These files were replaced by the versions in WWW. The content is basically the
 #H  same but the formatting has been much more friendly towards the HTML-Converter.
 #H  AH
 #H
 #H  Revision 1.1  1996/10/30 13:07:04  gap
 #H  added forum archive and translation files.
 #H
+#H  Revision 3.47.1.3  1996/03/21  14:09:12  sam
+#H  fixed name conflict ONM5 <-> (3^2:4xA6).2
+#H
 #H  Revision 3.47.1.2  1995/01/16  09:10:09  sam
 #H  added names W(E6), W(E8); added info for 2xS6(2) = W(E7)
 #H
@@ -784,7 +787,7 @@
 ["3^(2+4):2A5.D8",["LyM7"]],
 ["2^5.psl(5,2)",["ThM2"],["thm2"]],
 ["2^1+8.a9",["ThM3"],["thm3"]],
-["(3^2:4xA6).2",["ONM5"]],
+["ONM5"],
 ["3^(1+4):4A5",["HNM14","HNN3B"]],
 ["3^5:2S6",["ThM8","ThN3C"]],
 ["5^(1+4):2^(1+4).5.4",["HNM6","HNN5B"],["group4","hamax2"]],
Prereq: 3.30
--- tbl/ctomaxi2.tbl    1994/05/27 15:17:28
+++ tbl/ctomaxi2.tbl    1996/03/21 14:11:27
@@ -2,7 +2,7 @@
 ##
 #A  ctomaxi2.tbl                GAP table library
 ##
-#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
+#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
 ##
 #Y  Copyright 1990-1992,  Lehrstuhl D fuer Mathematik,  RWTH Aachen,  Germany
 ##
@@ -11,6 +11,9 @@
 ##  groups HS, McL, He, Ru, Suz, ON, HN, Ly, Th.
 ##
 #H  $Log: 1.html,v $
 #H  Revision 1.2  2004/04/21 15:06:18  felsch
 #H  Corrected links in the Forum Archive pages.   VF
 #H
 #H  Revision 1.1.1.1  2004/04/20 13:39:30  felsch
 #H  The final GAP-Forum archive until 2003.
 #H
 #H  Revision 1.5  2003/06/12 19:20:33  gap
 #H  Further update. AH
 #H
 #H  Revision 1.4  2003/06/12 17:28:25  gap
 #H  Address updates by JN. AH
 #H
 #H  Revision 1.3  1997/08/15 11:19:33  gap
 #H  New forum setup. AH
 #H
 #H  Revision 1.2  1997/04/24 15:32:47  gap
 #H  These files were replaced by the versions in WWW. The content is basically the
 #H  same but the formatting has been much more friendly towards the HTML-Converter.
 #H  AH
 #H
 #H  Revision 1.1  1996/10/30 13:07:04  gap
 #H  added forum archive and translation files.
 #H
+#H  Revision 3.30.1.1  1996/03/21  14:10:57  sam
+#H  fixed name  conflict ONM5 <-> (3^2:4xA6).2
+#H
 #H  Revision 3.30  1994/05/27  15:17:28  sam
 #H  fixed 'identifier' component in three tables
 #H
@@ -2784,7 +2787,7 @@
 automorphisms:=[(13,14)(15,16),(17,18),(11,12),( 7, 8)(13,15)(14,16)],
 libinfo:=rec(othernames:=["ONM9"]));

-LIBTABLE.ctomaxi2.("(3^2:4xA6).2"):=rec(
+LIBTABLE.ctomaxi2.("ONM5"):=rec(
 text:=ConcatenationString(
 "origin: constructed as subdirect product of 3^2:Q8 and M10,\n",
 "5th maximal subgroup of sporadic simple Onan group ON,\n",
@@ -2831,7 +2834,7 @@
 0,0],[40,-5,0,0,8,4,-8,0,-1,4,-5,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]],
 automorphisms:=[(26,27)(29,30),(23,24),(20,21)(23,24)(26,27)(29,30),(13,14)
 (23,24),(10,11),(25,28)(26,29)(27,30)],
-libinfo:=rec(othernames:=["ONM5"]));
+libinfo:=rec(othernames:=[]));

 LIBTABLE.ctomaxi2.("3^(1+4):4A5"):=rec(
 text:=ConcatenationString(
Prereq: 3.17
--- tbl/ctospora.tbl    1993/09/20 10:48:04
+++ tbl/ctospora.tbl    1996/03/21 14:10:18
@@ -2,7 +2,7 @@
 ##
 #A  ctospora.tbl                GAP table library
 ##
-#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
+#A  @(#)$Id: 1.html,v 1.2 2004/04/21 15:06:18 felsch Exp $
 ##
 #Y  Copyright 1990-1992,  Lehrstuhl D fuer Mathematik,  RWTH Aachen,  Germany
 ##
@@ -10,6 +10,9 @@
 ##  groups $HS$, $McL$, $He$, $Ru$, $Suz$, $ON$, $Ly$ and $Th$ of the ATLAS.
 ##
 #H  $Log: 1.html,v $
 #H  Revision 1.2  2004/04/21 15:06:18  felsch
 #H  Corrected links in the Forum Archive pages.   VF
 #H
 #H  Revision 1.1.1.1  2004/04/20 13:39:30  felsch
 #H  The final GAP-Forum archive until 2003.
 #H
 #H  Revision 1.5  2003/06/12 19:20:33  gap
 #H  Further update. AH
 #H
 #H  Revision 1.4  2003/06/12 17:28:25  gap
 #H  Address updates by JN. AH
 #H
 #H  Revision 1.3  1997/08/15 11:19:33  gap
 #H  New forum setup. AH
 #H
 #H  Revision 1.2  1997/04/24 15:32:47  gap
 #H  These files were replaced by the versions in WWW. The content is basically the
 #H  same but the formatting has been much more friendly towards the HTML-Converter.
 #H  AH
 #H
 #H  Revision 1.1  1996/10/30 13:07:04  gap
 #H  added forum archive and translation files.
 #H
+#H  Revision 3.17.1.1  1996/03/21  14:09:55  sam
+#H  fixed 'maxes' component of 'ON' for 'ONM5'
+#H
 #H  Revision 3.17  1993/09/20  10:48:04  sam
 #H  adjusted some table names
 #H
@@ -2220,7 +2223,7 @@
 projections:=[rec(name:="3.ON",
 map:=[1,4,7,8,11,14,17,18,21,24,27,30,33,36,37,40,41,42,45,48,51,54,57,60,63,
 66,69,72,75,78])],
-maxes:=["L3(7).2","L3(7).2","J1","4_2.L3(4).2_1","(3^2:4xA6).2",
+maxes:=["L3(7).2","L3(7).2","J1","4_2.L3(4).2_1","ONM5",
 "3^4:2^(1+4)D10","L2(31)","L2(31)","4^3.L3(2)","M11","M11","A7","A7"],
 powermap:=[,[1,1,3,2,2,6,3,8,9,5,5,6,13,7,8,17,16,10,10,11,11,23,24,22,12,12,
 15,15,29,30],[1,2,1,4,5,6,2,8,9,10,11,12,13,4,15,6,6,19,18,21,20,23,24,22,25,
END OF  bugfix07.dif ________________________________________________________

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