Module ZHERK in IMSLS

• IMSLS Information

• Components
  • Documentation from ITL
  • Example from ITL

ZHERK

 
Performs one of the Hermitian rank k operations C = alpha*A*ctrans( A ) + beta*C, or
C = alpha*ctrans( A )*A + beta*C, where alpha and beta are scalars, C is an n by n
Hermitian matrix and A is an n by k matrix in the first case and a k by n matrix in the
second case. The name 'ctrans' represents the conjugate transpose of the matrix.
 
Classes  :  D1b5 . Matrix addition, subtraction
 
Type     : Fortran subroutine in IMSLS library.
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL CHERK (UPLO, TRANS, N, K, ALPHA, A, LDA, BETA, C, LDC)
 
Details  : Documentation Example
Sites    : (1) ITL
 

Implementation of ZHERK from IMSLS on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Double. (Single: CHERK)
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : Login to spruce.nist.gov and see ITL How-To for
                  information on how to setup your environment and link.
   Documentation: cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Documentation/zherk
   Example      : cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/zherk