AbstractWe improve the constructions of S. Bagchi and B. Bagchi for Steiner 2-designs which are point-regular over the additive group of a Galois ring. As a consequence, we get new cyclotomic conditions leading to point-regular Steiner 2-designs with block sizek∈ {7, 9, 11, 13, 17}
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
If (OMEGA) is the set of zeros in AG(2m, 2) of a nondegenerate quadratic form, then there is a group...
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
We improve the constructions of S. Bagchi and B. Bagchi for Steiner 2-designs which are point-regula...
AbstractWe improve the constructions of S. Bagchi and B. Bagchi for Steiner 2-designs which are poin...
A general construction for Steiner 2-designs with prime power block size (and with a point-regular a...
A design is additive under an abelian group $G$ (briefly, $G$-additive) if, up to isomorphism, its p...
This paper surveys direct and recursive constructions for cyclic Steiner 2-designs. A new method is ...
AbstractIt is known that there are close relations between cyclic neofields and cyclic 2-designs wit...
AbstractA general construction for Steiner 2-designs with prime power block size (and with a point-r...
A Steiner 2-design is 1-rotational over a group G if it admits G as an automorphism group fixing one...
AbstractA Steiner 2-design is 1-rotational over a groupGif it admitsGas an automorphism group fixing...
AbstractLet CS(2, k, υ) denote a cyclic Steiner 2-design of order υ with block size k. Our main resu...
Up to now, all known Steiner 5-designs are on q + 1 points where q j 3 (mod 4) is a prime power and ...
We show that symmetric block designs D=(P, B) can be embedded in a suitable commutative group G_D in...
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
If (OMEGA) is the set of zeros in AG(2m, 2) of a nondegenerate quadratic form, then there is a group...
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
We improve the constructions of S. Bagchi and B. Bagchi for Steiner 2-designs which are point-regula...
AbstractWe improve the constructions of S. Bagchi and B. Bagchi for Steiner 2-designs which are poin...
A general construction for Steiner 2-designs with prime power block size (and with a point-regular a...
A design is additive under an abelian group $G$ (briefly, $G$-additive) if, up to isomorphism, its p...
This paper surveys direct and recursive constructions for cyclic Steiner 2-designs. A new method is ...
AbstractIt is known that there are close relations between cyclic neofields and cyclic 2-designs wit...
AbstractA general construction for Steiner 2-designs with prime power block size (and with a point-r...
A Steiner 2-design is 1-rotational over a group G if it admits G as an automorphism group fixing one...
AbstractA Steiner 2-design is 1-rotational over a groupGif it admitsGas an automorphism group fixing...
AbstractLet CS(2, k, υ) denote a cyclic Steiner 2-design of order υ with block size k. Our main resu...
Up to now, all known Steiner 5-designs are on q + 1 points where q j 3 (mod 4) is a prime power and ...
We show that symmetric block designs D=(P, B) can be embedded in a suitable commutative group G_D in...
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
If (OMEGA) is the set of zeros in AG(2m, 2) of a nondegenerate quadratic form, then there is a group...
We consider the following problem: given a partial geometry with v points and k points on a line, ca...
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