org.netlib.lapack
Class Dtbtrs

java.lang.Object
  extended by org.netlib.lapack.Dtbtrs

public class Dtbtrs
extends java.lang.Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.

* .. * * Purpose * ======= * * DTBTRS solves a triangular system of the form * * A * X = B or A**T * X = B, * * where A is a triangular band matrix of order N, and B is an * N-by NRHS matrix. A check is made to verify that A is nonsingular. * * Arguments * ========= * * UPLO (input) CHARACTER*1 * = 'U': A is upper triangular; * = 'L': A is lower triangular. * * TRANS (input) CHARACTER*1 * Specifies the form the system of equations: * = 'N': A * X = B (No transpose) * = 'T': A**T * X = B (Transpose) * = 'C': A**H * X = B (Conjugate transpose = Transpose) * * DIAG (input) CHARACTER*1 * = 'N': A is non-unit triangular; * = 'U': A is unit triangular. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * KD (input) INTEGER * The number of superdiagonals or subdiagonals of the * triangular band matrix A. KD >= 0. * * NRHS (input) INTEGER * The number of right hand sides, i.e., the number of columns * of the matrix B. NRHS >= 0. * * AB (input) DOUBLE PRECISION array, dimension (LDAB,N) * The upper or lower triangular band matrix A, stored in the * first kd+1 rows of AB. The j-th column of A is stored * in the j-th column of the array AB as follows: * if UPLO = 'U', AB(kd+1+i-j,j) = A(i,j) for max(1,j-kd)<=i<=j; * if UPLO = 'L', AB(1+i-j,j) = A(i,j) for j<=i<=min(n,j+kd). * If DIAG = 'U', the diagonal elements of A are not referenced * and are assumed to be 1. * * LDAB (input) INTEGER * The leading dimension of the array AB. LDAB >= KD+1. * * B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS) * On entry, the right hand side matrix B. * On exit, if INFO = 0, the solution matrix X. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,N). * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * > 0: if INFO = i, the i-th diagonal element of A is zero, * indicating that the matrix is singular and the * solutions X have not been computed. * * ===================================================================== * * .. Parameters ..


Constructor Summary
Dtbtrs()
           
 
Method Summary
static void dtbtrs(java.lang.String uplo, java.lang.String trans, java.lang.String diag, int n, int kd, int nrhs, double[] ab, int _ab_offset, int ldab, double[] b, int _b_offset, int ldb, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Dtbtrs

public Dtbtrs()
Method Detail

dtbtrs

public static void dtbtrs(java.lang.String uplo,
                          java.lang.String trans,
                          java.lang.String diag,
                          int n,
                          int kd,
                          int nrhs,
                          double[] ab,
                          int _ab_offset,
                          int ldab,
                          double[] b,
                          int _b_offset,
                          int ldb,
                          intW info)