Name:

Benouaz

First name:

Tayeb

E-mail:

t_benouaz@mail.univ-tlemcen.dz

Institution:

Laboratoire de Modélisation, Faculté des Sciences

Address:

B.p 119, Tlemcen R.p 13000, Algérie

Fax:

00.213.43.20.,43.30

Phone:

00.213.71.17.69.73

Title:

Study of the stability at the origin of the ratio-dependant model using the optimal derivative