HD0L-$\omega$-equivalence and periodicity problems in the primitive case   (to the memory of G. Rauzy)
  In this paper I would like to witness the mathematical inventiveness of G. Rauzy through personnal exchanges I had with him. The objects that will emerge will be used to treat the decidability of the HD 0 L $\omega$-equivalence and periodicity problems in the primitive case. 
Fabien Durand (LAMFA)
math.CO cs.DM