ATANH _ _ _ _ _ _ _ _ _ _ _ _ operator
The atanh operator returns the hyperbolic arctangent of its argument. The derivative of asinh and some simple transformations are known to the system.
<expression> may be any scalar REDUCE expression, not an array, matrix or vector expression. <simple\_expression> must be a single identifier or begin with a prefix operator name.
atanh aa; ATANH(AA) atanh(1); ATANH(1) df(atanh(x*y),y); - X ---------- 2 2 X *Y - 1
A numeric value is not returned by asinh unless the switc h rounded is on and its argument evaluates to a number. You may attach additional functionality by defining atanh to be the inverse of tanh. This is done by the commands
put('tanh,'inverse,'atanh); put('atanh,'inverse,'tanh);