supported by the Program for New Century Excellent Talents in University(Grant No.04-0522);the second author was supported by the National Natural Science Foundation of China(Grant Nos.10271113&10501041);the Doctoral Foundation of the Chinese Education Ministry.
In this paper, we study the structures of monomial Hopf algebras over a field of positive characteristic. A necessary and sufficient condition for the monomial coalgebra Cd(n) to admit Hopf structures is given here, a...