.TH "BLAS/SRC/dznrm2.f90" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
BLAS/SRC/dznrm2.f90
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "real(wp) function \fBdznrm2\fP (n, x, incx)"
.br
.RI "\fBDZNRM2\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "real(wp) function dznrm2 (integer n, complex(wp), dimension(*) x, integer incx)"

.PP
\fBDZNRM2\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 DZNRM2 returns the euclidean norm of a vector via the function
 name, so that

    DZNRM2 := sqrt( x**H*x )
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIN\fP 
.PP
.nf
          N is INTEGER
         number of elements in input vector(s)
.fi
.PP
.br
\fIX\fP 
.PP
.nf
          X is COMPLEX*16 array, dimension (N)
         complex vector with N elements
.fi
.PP
.br
\fIINCX\fP 
.PP
.nf
          INCX is INTEGER, storage spacing between elements of X
          If INCX > 0, X(1+(i-1)*INCX) = x(i) for 1 <= i <= n
          If INCX < 0, X(1-(n-i)*INCX) = x(i) for 1 <= i <= n
          If INCX = 0, x isn't a vector so there is no need to call
          this subroutine\&.  If you call it anyway, it will count x(1)
          in the vector norm N times\&.
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Edward Anderson, Lockheed Martin 
.RE
.PP
\fBDate\fP
.RS 4
August 2016 
.RE
.PP
\fBContributors:\fP
.RS 4
Weslley Pereira, University of Colorado Denver, USA 
.RE
.PP
\fBFurther Details:\fP
.RS 4

.PP
.nf
  Anderson E\&. (2017)
  Algorithm 978: Safe Scaling in the Level 1 BLAS
  ACM Trans Math Softw 44:1--28
  https://doi\&.org/10\&.1145/3061665

  Blue, James L\&. (1978)
  A Portable Fortran Program to Find the Euclidean Norm of a Vector
  ACM Trans Math Softw 4:15--23
  https://doi\&.org/10\&.1145/355769\&.355771
.fi
.PP
 
.RE
.PP

.PP
Definition at line \fB89\fP of file \fBdznrm2\&.f90\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.