A Classification of Irreducible Prehomogeneous Vector Spaces over an Algebraically Closed Field of Characteristic 2(I)

<正> When the base field K is an algebraically closed field of characteristic p>2.a classification ofreduced irreducible triplets satisfying the condition dim G≥dim V was given in[3].In this paperwe consider the case that K is an algebraically closed field of characteristic 2.In this case,there areno weights in an alcove,all the weights are on the walls,so any Weyl module might be a reducible