Data Structures

Data Types

Data Type	Description
s	Single-precision floating point
d	Double-precision floating point
c	Single-precision complex number
z	Double-precision complex number

Storage Types

A common matrix is stored in the column-major mode of Fortran. The indexes involved in the data structure start from 1 (for example, the values stored in ipiv).

Packed storage matrix: a column-major storage manner. For a real symmetric, conjugate symmetric, upper triangular, or lower triangular matrix, only half of elements are required to determine the entire matrix. Therefore, a packed format can be used to store only this part of data. For packed storage matrix A of , storage locations of elements are as follows:

Upper triangle storage (uplo='U', $\text{[math]}$ ): $\text{[math]}$
Lower triangle storage (uplo='L', $\text{[math]}$ ): $\text{[math]}$

Parent topic: KML_LAPACK Library Functions