David Hobby
Department of Mathematics SUNY of New Paltz
United States

David Hobby
Department of Mathematics
SUNY of New Paltz, USA
email:hobbyd@newpaltz.edu

Barna Iantovics
"Petru Maior" University of Targu Mures
Romania

Barna Laszlo Iantovics
Petru Maior University of Targu Mures, Romania
email:ibarna@upm.ro

Florin Felix Nichita
Institute of Mathematics "Simion Stoilow" of the Romanian Academy, Bucharest
Romania

Florin Felix Nichita
Institute of Mathematics "Simion Stoilow" of the Romanian Academy
Bucharest, Romania
email:Florin.Nichita@imar.ro