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- Newsgroups: sci.math
- Path: sparky!uunet!mcsun!sunic!liuida!isy!cj
- From: cj@isy.liu.se (Christian Jonsson)
- Subject: Generating Group for Johnson Space/Scheme/Graph
- Message-ID: <cj.715242479@melusine>
- Sender: news@isy.liu.se (Lord of the News)
- Organization: Dept of EE, University of Linkoping
- Date: 31 Aug 92 06:27:59 GMT
- Lines: 31
-
- Space/Scheme: Given the set of points in the Hamming space of
- length n and constant weight w.
-
- J(n,w)= x in H(n): w(x)=w
-
- Is there a (permutation) group in Sn of size
- n choose w, that generates the whole space from
- an (arbitrary) starting point (in J(n,w))?
-
- Graph: Given the distance regular graph; the collection
- of all w-subset of an n-set X.
-
- Is there a (permutation) group in Sn of size
- n choose w, that generates the graph from
- an (arbitrary) starting vertex?
-
-
- Follow up question:
-
- Given a generating group for the Johnson space,
- is the cyclic subgroup of w-shifts a normal subgroup?
-
-
- If necessary, assume w divides n!
- --
- ____________________________________________________________________________
- Christian J÷nsson E-mail: cj@isy.liu.se
- Division of Data Transmission Telephone: (+46) 13 28 2653
- Department of Electrical Engineering Telefax: (+46) 13 28 1339
- Link÷ping University SWEDEN
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