摘要
Let F be a field and V= V<sub>n</sub>（F）={（a<sub>1</sub>,…, a<sub>n</sub>）|a<sub>i</sub>∈F} be the row vector space of finite dimension n over F. Let be a finite set ofsubspaces of Vsuch that U=（0）. And let L= L（（?）） be the set of intersections of dements of. Partial order L by reverse inclusion has V as its minimal element and as its set of atoms. We denote the partial order-
