lower triangular matrix [数] 下三角形矩阵 ; 下三角矩阵

unit lower triangular matrix 单位下三角阵

strictly lower triangular matrix 严格下三角矩阵

lower-triangular matrix 下三角形矩阵

lower triangular infinite matrix 下三角无穷矩阵

elementary lower triangular matrix 初等下三角矩阵

lower-triangular matrix decomposition 下三角分解

lower r triangular matrix 下三角形矩阵

lower triangular complex matrix 下三角复矩阵