(1) -> acosh(0.3::Complex Float)
(1) 0.67762635780344027125E-20 + 1.2661036727794991113 %i
Type: Complex(Float)
The real part should be 0. My question is, this error, which is
2*2^-68 (68 is bits()$Float), is it too big? (It should be 2^-68,
I think.)
The definition of acosh of Complex Float is in trigcat.spad:
acosh x == 2*log(sqrt((x+1)/2::%) + sqrt((x-1)/2::%))
The "2" double the error. I'm still looking at various parts,
especially sqrt$Float. I want to know your opinion.
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