Calling Sequence Arguments for a Matrix Containing the Multiple Right-Hand Sides Argument Meaning n is the number of rows in the global general submatrix B . For more details, see Table 22 and Table 16 . An array descriptor, which is an integer array, is needed for each block-distributed matrix. The process grid definition and the array descriptor are used to establish the mapping between the global matrix and its corresponding process and distributed memory location. A indicates a banded, tridiagonal, or symmetric tridiagonal matrix.
B indicates a matrix containing the multiple right-hand sides matrix.
When you place a call to the banded or tridiagonal subroutines, you must be careful to choose consistent combinations of array descriptor types for matrix A and matrix B , and process grids. Therefore, depending on which subroutine you are using in the Banded Linear Algebraic Equations, you may choose different array descriptors in the same subroutine calling sequence. 502 for matrix B . This value may be different on each process. For the tridiagonal subroutines, this argument is ignored.