[Octave-bug-tracker] [bug #43349] asin() behaves differently from Matlab for arguments larger than 1

[John W. Eaton]

Follow-up Comment #25, bug #43349 (project octave):

Again?  Ugh.

I think my patch https://savannah.gnu.org/support/download.php?file_id=32234
is the right thing to do.  If the imaginary part of x is -0, then x*x will
have +0 as the imaginary part, and that looks like a real number, so 1-x*x
should not generate a negative imaginary part. Likewise if x has +0 as the
imaginary part, it looks like a real number, so x*x should be real, so 1-x*x
should not have a negative imaginary part. Does that make sense? In any case
and FWIW, I think it is compatible with Matlab. 

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