Re primitive binary matrices?

[Meeussen Wouter (bkarnd)]

symmetric and non-zero Det
{1, 4, 32, 528} offset=1 , not in EIS
symmetric and strictly positive Det
{1, 1, 5, 338} offset=1 , not in EIS

what's the GF(2) ?

W.


-----Original Message-----
From: N. J. A. Sloane [mailto:njas at research.att.com]
Sent: vrijdag 22 augustus 2003 15:54
To: njas at research.att.com; seqfan at ext.jussieu.fr
Cc: dekelyuval at hotmail.com; wouter.meeussen at vandemoortele.com;
kennedy at oldnews.org
Subject: Re primitive binary matrices?



1.  Thanks to kennedy at oldnews.org and wouter.meeussen at vandemoortele.com
for computing the start of that sequence - it will be A070322
in a few minutes

2.  Yuval Dekel <dekelyuval at hotmail.com> asks if these two
sequences are in the OEIS:

Symmetric invertible 0,1 matrices (over the reals)
Symmetric invertible 0,1 matrices (over GF(2))

I don't know the answer - could someone work
out a few terms and check?

NJAS


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