On 4/25/07, Henry Rich <[EMAIL PROTECTED]> wrote:
Are the computations carefully arranged so that numbers that are known to approach close to 0 are allowed as operands only to a restricted set of functions that are known not to push them over the boundary?
I think the specific issue is not branch cuts as a whole, but the complex domain of ^. when negative real numbered values are used. If other arithmetic operations retain the sign of the complex zero, then the complex part of the result of ^. can be pi or -pi, as appropriate. For example, ^.^ in ^.^0j_1p1 could be replaced by an identity. And, I'm not sure what we have to offer as a replacement for exponentials in the complex domain that better handles this issue. -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
