  The notion of breadth of a nilpotent Lie algebra was introduced by B.
Khuhirun, K.C. Misra and E. Stitzinger and used to approach problems of
classification up to isomorphism. In the present paper, we study this invariant
in terms of characteristic sequence, another invariant introduced by M. Goze
and J.M. Ancochea-Bermudez. This permits to complete the determination of Lie
algebras of breadth 2 and to begin the work for Lie algebras with breadth
greater than 2.
