We present a new method for the study of hemisystems of the Hermitian surface of . The basic idea is to represent generator-sets of by means of a maximal curve naturally embedded in so that a sufficient condition for the existence of hemisystems may follow from results about maximal curves and their automorphism groups. In this paper we obtain a hemisystem in for each p prime of the form with an integer n. Since the famous Landau's conjecture dating back to 1904 is still to be proved (or disproved), it is unknown whether there exists an infinite sequence of such primes. What is known so far is that just 18 primes up to 51000 with this property exist, namely . The scarcity of such primes seems to confirm that hemisystems of are rare objects.
Hemisystems of the Hermitian surface
G. Korchmaros;P. Speziali
2019-01-01
Abstract
We present a new method for the study of hemisystems of the Hermitian surface of . The basic idea is to represent generator-sets of by means of a maximal curve naturally embedded in so that a sufficient condition for the existence of hemisystems may follow from results about maximal curves and their automorphism groups. In this paper we obtain a hemisystem in for each p prime of the form with an integer n. Since the famous Landau's conjecture dating back to 1904 is still to be proved (or disproved), it is unknown whether there exists an infinite sequence of such primes. What is known so far is that just 18 primes up to 51000 with this property exist, namely . The scarcity of such primes seems to confirm that hemisystems of are rare objects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
