15 search results - page 2 / 3 » Partial automorphism semigroups |
JCT
2002
13 years 5 months ago
2002
JSC
2010
13 years 3 months ago
2010
We examine designs and binary codes associated with the line graph of the n-cube Qn, i.e. the Hamming graph H(n, 2). We find the automorphism groups and the parameters of the cod...
DM
2010
13 years 5 months ago
2010
In this paper, we first prove some general results on the number of fixed points of collineations of finite partial geometries, and on the number of absolute points of dualities o...
EJC
2007
13 years 5 months ago
2007
3 We define four families of geometries with as point graph the graph — or its complement — of all elliptic 4 hyperplanes of a given parabolic quadric in any finite 6-dimensi...
IJAC
2008
13 years 5 months ago
2008
We study what kinds of limits are preserved by the greatest semilattice image functor from the category of all semigroups to its subcategory of all semilattices. The second autho...