.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Sat Jul 24 19:44:26 1993 by Rik Faith (faith@cs.unc.edu)
.\"
.\" Traducido al castellano (con permiso) por:
.\" Sebastian Desimone (chipy@argenet.com.ar) (desimone@fasta.edu.ar)
.\" Translation fixed on Mon Apr 27 18:22:37 CEST 1998 by Gerardo
.\" Aburruzaga García <gerardo.aburruzaga@uca.es>
.\"
.TH ERF 3  "21 Enero 1995" "BSD" "Manual del Programador de Linux"
.SH NOMBRE
erf, erfc \- función error y función error complementario
.SH SINOPSIS
.nf
.B #include <math.h>
.sp
.BI "double erf(double " x );
.sp
.BI "double erfc (double " x );
.fi
.SH DESCRIPCIÓN
La función \fBerf()\fP devuelve la función error de \fIx\fP; definida como
.TP
erf(x) = 2/sqrt(pi)* integral desde 0 hasta x de exp(-t*t) dt
.PP
La función \fBerfc()\fP devuelve la función error complementario de 
\fIx\fP, que es 1.0 - erf(x).
.SH "CONFORME A"
SVID 3, BSD 4.3
.SH "VÉASE TAMBIÉN"
.BR exp (3)