Question

[Ntountoulakis Xristos]

In fact I'm writing a scientific article (AMS) and everything is ok except 
for one thing!Between the authors and their address there is the current 
date appearing on the .ps file but I can't find it on the .tex file where 
I export my .lyx file.I would like to erase the date and I don't know how!
Thank you very much for your time :)