Çankaya Üniversitesi Matematik Bölümü Seminerleri
Value sets of Lattes maps over finite fields
Ömer Küçüksakallı
O.D.T.Ü., Türkiye
We give an alternative computation of the value sets of Dickson
polynomials over finite fields by using a singular cubic curve. Our
method is not only simpler but also it can be generalized to the
non-singular elliptic case. We determine the value sets of Lattes
maps over finite fields which are rational functions induced by
isogenies of elliptic curves with complex multiplication.
