In practical application,the matris is not only provide a good method for us to solve linear simultaneous equations,but also put into widely use in computer field:digital image prosessing,Artificial Intelligence,network service,and common arithmetic and analysis.they all depend on matris to solve practical problems.what this article said is that the special form of matris:composite matrix,it is in widely use in information encryption.this article introduces the definition and basic properties of matris,then talk about the properties of its determinant and original matris determinant.and also infer the closure of the transformational composition.At last,we choose three special matris:lower triangular matris,quadratic form and orthogonal matris for researching,and talk about index of intertia and other properties to understand the composite matris more deeply.
累啊. 别忘了每句首字母改成大写