Lattices Associated with a Finite Vector Space ()
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ABSTRACT
Let be a n-dimensional row vector space over a finite field For , let be a d- dimensional subspace of . denotes the set of all the spaces which are the subspaces of and not the subspaces of except . We define the partial order on by ordinary inclusion (resp. reverse inclusion), and then is a poset, denoted by (resp. ). In this paper we show that both and are finite atomic lattices. Further, we discuss the geometricity of and , and obtain their characteristic polynomials.
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