NAME

catanh, catanhf - complex arc hyperbolic tangent functions

SYNOPSIS

##iinncclluuddee <> <> <><> ddoouubbllee ccoommpplleexx ccaattaannhh((ddoouubbllee ccoommpplleexx _z));; <> ffllooaatt ccoommpplleexx ccaattaannhhff((ffllooaatt ccoommpplleexx _z));; <>

DESCRIPTION

These functions compute the complex arc hyperbolic tangent of _z, with branch cuts outside the interval [-1, +1] along the real axis.

RETURN VALUE

These functions return the complex arc hyperbolic tangent value, in the range of a strip mathematically unbounded along the real axis and in the interval [-_ipi/2, +_ipi/2] along the imaginary axis.

ERRORS

No errors are defined.

_T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

_c_t_a_n_h(), the Base Definitions volume of IEEE Std 1003.1-2001, _<_c_o_m_p_l_e_x_._h_>

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .