Autotopism groups of cyclic semifield planes

On a generalization of cyclic semifields

A new construction is given of cyclic semifields of orders q2n, n odd, with kernel (left nucleus) Fqn and right and middle nuclei isomorphic to Fq2 , and the isotopism classes are determined. Furthermore, this construction is generalized to produce potentially new semifields of the same general type that are not isotopic to cyclic semifields. In particular, a new semifield plane of order 45 and...

New Semifield Planes of order 81 ∗

A finite semifield D is a finite nonassociative ring with identity such that the set D∗ = D \ {0} is closed under the product. From any finite semifield a projective plane can be constructed. In this paper we obtain new semifield planes of order 81 by means of computational methods. These computer-assisted results yield to a complete classification (up to isotopy) of 81-element finite semifields.

New Semifield Planes of orders 64 and 81

A finite semifield D is a finite nonassociative ring with identity such that the set D∗ = D \ {0} is closed under the product. From any finite semifield a projective plane can be constructed. In this paper we obtain new semifield planes of orders 64 and 81 by means of computational methods. These computer-assisted results yield to a complete classification (up to isotopy) of 81-element finite s...

ON TRANSLATION PLANES OF ORDER q WHICH ADMIT AN AUTOTOPISM GROUP HAVING AN ORBIT OF LENGTH q-q

The six semifield planes associated with a semifield flock

In 1965 Knuth [17] noticed that a finite semifield was determined by a 3-cube array (aijk) and that any permutation of the indices would give another semifield. In this article we explain the geometrical significance of these permutations. It is known that a pair of functions (f, g) where f and g are functions from GF (q) to GF (q) with the property that f and g are linear over some subfield an...