Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.netlib.blas
Class Ssyr2

    java.lang.Object
      org.netlib.blas.Ssyr2

    public class Ssyr2

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
     *  =======
     *
     *  SSYR2  performs the symmetric rank 2 operation
     *
     *     A := alpha*x*y' + alpha*y*x' + A,
     *
     *  where alpha is a scalar, x and y are n element vectors and A is an n

     *  by n symmetric matrix.
     *
     *  Arguments
     *  ==========
     *
     *  UPLO   - CHARACTER*1.
     *           On entry, UPLO specifies whether the upper or lower
     *           triangular part of the array A is to be referenced as
     *           follows:
     *
     *              UPLO = 'U' or 'u'   Only the upper triangular part of A
     *                                  is to be referenced.
     *
     *              UPLO = 'L' or 'l'   Only the lower triangular part of A
     *                                  is to be referenced.
     *
     *           Unchanged on exit.
     *
     *  N      - INTEGER.
     *           On entry, N specifies the order of the matrix A.
     *           N must be at least zero.
     *           Unchanged on exit.
     *
     *  ALPHA  - REAL            .
     *           On entry, ALPHA specifies the scalar alpha.
     *           Unchanged on exit.
     *
     *  X      - REAL             array of dimension at least
     *           ( 1 + ( n - 1 )*abs( INCX ) ).
     *           Before entry, the incremented array X must contain the n
     *           element vector x.
     *           Unchanged on exit.
     *
     *  INCX   - INTEGER.
     *           On entry, INCX specifies the increment for the elements of
     *           X. INCX must not be zero.
     *           Unchanged on exit.
     *
     *  Y      - REAL             array of dimension at least
     *           ( 1 + ( n - 1 )*abs( INCY ) ).
     *           Before entry, the incremented array Y must contain the n
     *           element vector y.
     *           Unchanged on exit.
     *
     *  INCY   - INTEGER.
     *           On entry, INCY specifies the increment for the elements of
     *           Y. INCY must not be zero.
     *           Unchanged on exit.
     *
     *  A      - REAL             array of DIMENSION ( LDA, n ).
     *           Before entry with  UPLO = 'U' or 'u', the leading n by n
     *           upper triangular part of the array A must contain the upper

     *           triangular part of the symmetric matrix and the strictly
     *           lower triangular part of A is not referenced. On exit, the
     *           upper triangular part of the array A is overwritten by the
     *           upper triangular part of the updated matrix.
     *           Before entry with UPLO = 'L' or 'l', the leading n by n
     *           lower triangular part of the array A must contain the lower

     *           triangular part of the symmetric matrix and the strictly
     *           upper triangular part of A is not referenced. On exit, the
     *           lower triangular part of the array A is overwritten by the
     *           lower triangular part of the updated matrix.
     *
     *  LDA    - INTEGER.
     *           On entry, LDA specifies the first dimension of A as declared
     *           in the calling (sub) program. LDA must be at least
     *           max( 1, n ).
     *           Unchanged on exit.
     *
     *
     *  Level 2 Blas routine.
     *
     *  -- Written on 22-October-1986.
     *     Jack Dongarra, Argonne National Lab.
     *     Jeremy Du Croz, Nag Central Office.
     *     Sven Hammarling, Nag Central Office.
     *     Richard Hanson, Sandia National Labs.
     *
     *
     *     .. Parameters ..

Constructor Summary
`Ssyr2()`

Method Summary
`static void` | `ssyr2(java.lang.String uplo, int n, float alpha, float[] x, int _x_offset, int incx, float[] y, int _y_offset, int incy, float[] a, int _a_offset, int lda)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Ssyr2

    public Ssyr2()

Method Detail

### ssyr2

    public static void ssyr2(java.lang.String uplo,
                             int n,
                             float alpha,
                             float[] x,
                             int _x_offset,
                             int incx,
                             float[] y,
                             int _y_offset,
                             int incy,
                             float[] a,
                             int _a_offset,
                             int lda)

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD