row over
9.Let F_q be the finite field with q ements,where q is a power of a prime,and F~n_q are the n-dimensional row vector space over F_q, the set of subspaces in F~n_q is used to construct two kinds of lattices L(F~n_q) and L(m,s;2ν), and the M?bius function of these Lattices is proved by the M?bius inversion.

