GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
zupgtr.f(3) LAPACK zupgtr.f(3)

zupgtr.f -


subroutine zupgtr (UPLO, N, AP, TAU, Q, LDQ, WORK, INFO)
 
ZUPGTR

ZUPGTR
Purpose:
 ZUPGTR generates a complex unitary matrix Q which is defined as the
 product of n-1 elementary reflectors H(i) of order n, as returned by
 ZHPTRD using packed storage:
if UPLO = 'U', Q = H(n-1) . . . H(2) H(1),
if UPLO = 'L', Q = H(1) H(2) . . . H(n-1).
Parameters:
UPLO
          UPLO is CHARACTER*1
          = 'U': Upper triangular packed storage used in previous
                 call to ZHPTRD;
          = 'L': Lower triangular packed storage used in previous
                 call to ZHPTRD.
N
          N is INTEGER
          The order of the matrix Q. N >= 0.
AP
          AP is COMPLEX*16 array, dimension (N*(N+1)/2)
          The vectors which define the elementary reflectors, as
          returned by ZHPTRD.
TAU
          TAU is COMPLEX*16 array, dimension (N-1)
          TAU(i) must contain the scalar factor of the elementary
          reflector H(i), as returned by ZHPTRD.
Q
          Q is COMPLEX*16 array, dimension (LDQ,N)
          The N-by-N unitary matrix Q.
LDQ
          LDQ is INTEGER
          The leading dimension of the array Q. LDQ >= max(1,N).
WORK
          WORK is COMPLEX*16 array, dimension (N-1)
INFO
          INFO is INTEGER
          = 0:  successful exit
          < 0:  if INFO = -i, the i-th argument had an illegal value
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 115 of file zupgtr.f.

Generated automatically by Doxygen for LAPACK from the source code.
Sat Nov 16 2013 Version 3.4.2

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.