N° 34 – June 2015 Italian Journal of Pure and Applied Mathematics ISSN 2239-0227 EDITOR-IN-CHIEF Piergiulio Corsini Editorial Board Saeid Abbasbandy Reza Ameri Luisa Arlotti Krassimir Atanassov Malvina Baica Federico Bartolozzi Rajabali Borzooei Carlo Cecchini Gui-Yun Chen Domenico Nico Chillemi Stephen Comer Irina Cristea Mohammad Reza Darafsheh Bal Kishan Dass Bijan Davvaz Mario De Salvo Alberto Felice De Toni Franco Eugeni Giovanni Falcone Yuming Feng Antonino Giambruno Furio Honsell Luca Iseppi James Jantosciak Tomas Kepka David Kinderlehrer Andrzej Lasota Violeta Leoreanu-Fotea Maria Antonietta Lepellere Mario Marchi Donatella Marini Angelo Marzollo Antonio Maturo M. Reza Moghadam Syed Tauseef Mohyud-Din Petr Nemec Vasile Oproiu Livio C. Piccinini Goffredo Pieroni Flavio Pressacco Vito Roberto Ivo Rosenberg Gaetano Russo Paolo Salmon Maria Scafati Tallini Kar Ping Shum Alessandro Silva Florentin Smarandache Sergio Spagnolo Stefanos Spartalis Hari M. Srivastava Marzio Strassoldo Yves Sureau Carlo Tasso Ioan Tofan Aldo Ventre Thomas Vougiouklis Hans Weber Xiao-Jun Yang Yunqiang Yin Mohammad Mehdi Zahedi Fabio Zanolin Paolo Zellini Jianming Zhan F O R U M