A. O. Celebi

Head of Ankara Branch of Turkish Mathematical Society
Middle East Technical University, Ankara Turkey.
E-mail: okay.celebi@gmail.com


A. Hasanov (Hasanoglu)

Kocaeli University,
Department of Mathematics,
Umuttepe Kampusu, Izmit-Kocaeli, 41380, Turkey.
Tel: (90) 262 303 21 18;
Mobil Tel: (90) 532 465 28 84
E-mail: alemdar.hasanoglu@gmail.com


A. Erdem

Kocaeli University,
Department of Mathematics,
Umuttepe Kampusu, Izmit-Kocaeli, 41380, Turkey.
Tel: (90) 262 303 21 02;
Mobil Tel: (90) 533 730 45 22
E-mail: erdem.arzu@gmail.com