inseparable morphism

In this note,all projective indecomposable modules over generalized Witt algebra W(2,1)with character height■0 in characteristic 2 are realized,and all related Cartan invariants are computed.

研究了特征为2的代数闭域上广义Witt代数W(2,1)的投射不可分解模,给出了特征标高度ht_X■0的所有投射不可分解模同构类的代表元和Cartan不变量。