Re^3: [OT] Function to do x**y for |y|<1 w/o ** operator.

in reply to Re^2: [OT] Function to do x**y for |y|<1 w/o ** operator.
in thread [OT] Function to do x**y for |y|<1 w/o ** operator.

He has log, but not exp.

Perhaps there's also something helpful in Math::BigFloat's _pow() sub:

  # Taylor:       |   u    u^2    u^3         |
  # x ** y  = 1 + |  --- + --- + ----- + ...  |
  #               |_  1    1*2   1*2*3       _|
[download]

where (I gather)

u = y * ln x
[download]

Cheers,
Rob

In Section Seekers of Perl Wisdom