On timelike Bonnet surfaces in Lorentzian 3-manifold

In this paper we generalized a result of Soley Ersoy and Kemal Eren 10 about Bonnet timelike surface in Minkowski 3-space. We give a necessary and sufficient condition for a surface M in a Lorentzian 3-space to be timelike Bonnet surface. At the end, a theorem of classification of timelike Bonnet surface in a Lorentzian 3-space is given.