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.IX Title "build::libcerf::src::libcerf::man::dawson 3"
.TH build::libcerf::src::libcerf::man::dawson 3 2025-08-23 "perl v5.42.0" "libcerf manual"
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.SH NAME
cdawson, dawson \- Dawson\*(Aqs integral
.SH SYNOPSIS
.IX Header "SYNOPSIS"
\&\fB#include <cerf.h\fR>
.PP
\&\fBdouble _Complex cdawson ( double _Complex z );\fR
.PP
\&\fBdouble          dawson  ( double x );\fR
.SH DESCRIPTION
.IX Header "DESCRIPTION"
The function \fBcdawson\fR returns Dawson\*(Aqs integral D(z) = exp(\-z^2) integral from 0 to z exp(t^2) dt = sqrt(pi)/2  *  exp(\-z^2) * erfi(z).
.PP
For function \fBdawson\fR takes a real argument x, and returns the real result D(x).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
The computation of D(z) is based on Faddeeva\*(Aqs function \fBw_of_z\fR(3); to compute D(x), the imaginary part \fBim_w_of_x\fR(3) is used.
.PP
Other complex error functions: \fBw_of_z\fR(3), \fBvoigt\fR(3), \fBcerf\fR(3), \fBerfcx\fR(3), \fBerfi\fR(3).
.PP
Homepage: http://apps.jcns.fz\-juelich.de/libcerf
.SH AUTHORS
.IX Header "AUTHORS"
Steven G. Johnson, http://math.mit.edu/~stevenj,
  Massachusetts Institute of Technology,
  researched the numerics, and implemented the Faddeeva function.
.PP
Joachim Wuttke <j.wuttke@fz\-juelich.de>, Forschungszentrum Juelich,
  reorganized the code into a library, and wrote this man page.
.PP
Please report bugs to the authors.
.SH COPYING
.IX Header "COPYING"
Copyright (c) 2012 Massachusetts Institute of Technology
.PP
Copyright (c) 2013 Forschungszentrum Juelich GmbH
.PP
Software: MIT License.
.PP
This documentation: Creative Commons Attribution Share Alike.