161308Sbostic.\" Copyright (c) 1985, 1991, 1993 261308Sbostic.\" The Regents of the University of California. All rights reserved. 324694Smckusick.\" 448352Scael.\" %sccs.include.redist.man% 524694Smckusick.\" 6*66947Sbostic.\" @(#)j0.3 8.2 (Berkeley) 04/19/94 748352Scael.\" 848352Scael.Dd 948352Scael.Dt J0 3 1048352Scael.Os BSD 4 1148352Scael.Sh NAME 1248352Scael.Nm j0 , 1348352Scael.Nm j1 , 1448352Scael.Nm jn , 1548352Scael.Nm y0 , 1648352Scael.Nm y1 , 1748352Scael.Nm yn 1848352Scael.Nd bessel functions of first and second kind 1948352Scael.Sh SYNOPSIS 2048352Scael.Fd #include <math.h> 2148352Scael.Ft double 2248352Scael.Fn j0 "double x" 2348352Scael.Ft double 2448352Scael.Fn j1 "double x" 2548352Scael.Ft double 2648352Scael.Fn jn "int n" "double x" 2748352Scael.Ft double 2848352Scael.Fn y0 "double x" 2948352Scael.Ft double 3048352Scael.Fn y1 "double x" 3148352Scael.Ft double 3248352Scael.Fn yn "int n" "double x" 3348352Scael.Sh DESCRIPTION 3448352ScaelThe functions 3548352Scael.Fn j0 3648352Scaeland 3748352Scael.Fn j1 3848352Scaelcompute the 3948352Scael.Em Bessel function of the first kind of the order 4048352Scael0 and the 4148352Scael.Em order 4248352Scael1, respectively, 4348352Scaelfor the 4448352Scaelreal value 4548352Scael.Fa x ; 4648352Scaelthe function 4748352Scael.Fn jn 4848352Scaelcomputes the 4948352Scael.Em Bessel function of the first kind of the integer order 5048352Scael.Fa n 5148352Scaelfor the real value 5248352Scael.Fa x . 5348352Scael.Pp 5448352ScaelThe functions 5548352Scael.Fn y0 5648352Scaeland 5748352Scael.Fn y1 5848352Scaelcompute the linearly independent 5948352Scael.Em Bessel function of the second kind of the order 6048352Scael0 and the 6148352Scael.Em order 6248352Scael1, respectively, 63*66947Sbosticfor the positive 6448352Scael.Em integer 6548352Scaelvalue 6648352Scael.Fa x 6748352Scael(expressed as a double); 6848352Scaelthe function 6948352Scael.Fn yn 7048352Scaelcomputes the 7148352Scael.Em Bessel function of the second kind for the integer order 7248352Scael.Fa n 73*66947Sbosticfor the positive 7448352Scael.Em integer 7548352Scaelvalue 7648352Scael.Fa x 7748352Scael(expressed as a double). 7848352Scael.Sh RETURN VALUES 7948352ScaelIf these functions are successful, 8048352Scaelthe computed value is returned. On the 8148352Scael.Tn VAX 8248352Scaeland 8348352Scael.Tn Tahoe 8448352Scaelarchitectures, 8548352Scaela negative 8648352Scael.Fa x 8748352Scaelvalue 8848352Scaelresults in an error; the global 8948352Scaelvariable 9048352Scael.Va errno 9148352Scaelis set to 9248352Scael.Er EDOM 9348352Scaeland a reserve operand fault is generated. 9448352Scael.Sh SEE ALSO 9548352Scael.Xr math 3 , 9648352Scael.Xr infnan 3 9748352Scael.Sh HISTORY 9848352ScaelA set of these functions 9948352Scaelfunction appeared in 10048352Scael.At v7 . 101