Svetlana Todorova Topalova
professor 
Institute of Mathematics and Informatics,
Bulgarian Academy of Sciences.
Research
Interests:
construction and study of combinatorial designs and error-correcting codes,
resolvable designs, orthogonal resolutions, spreads and packings of projective
spaces, automorphism groups of designs and codes
Where
I work - the institute, the town of Veliko Tarnovo, the colleagues
Address
Svetlana Topalova
Institute of Mathematics and Informatics
P.O.Box 323
5000 V.Tarnovo
Bulgaria
e-mail
svetlana@math.bas.bg
Hadamard matrices of order 44 with automorphisms of order 7
Hadamard
2-(63,31,15) designs invariant under the dihedral
group of order 10
1-parallelisms
of PG(3,4) with automorphisms
of order 7
2-parallelisms of PG(5,2)
with automorphisms of order 31
Transitive 2-parallelisms of PG(5,2)
Parallelisms of PG(3,4)
with automorphisms of orders 7 and 5
Resolutions
of cyclic STS(v) with v ≤ 39
Conflict-avoiding codes for
3, 4 and 5
active users
Conflict-avoiding codes for
6 and 7 active users
Tight conflict-avoiding
codes for 3, 4, 5, 6 and 7
active users
Strongly conflict-avoiding
codes for 3, 4 and 5 active users
Permutations for the Improved GFS (k ≤ 16)
Permutations
for the Improved GFS (2 ≤ k ≤ 2048)