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Hi;The guys at Waterloo say:

The csgn function is used to determine in which half-plane ("left" or "right") the complex-valued expression or number x lies.

Then what is csgn for?

Hi;I would use the sgn(z).

If I want to find sign of complex number what should I use, sgn(z) or csgn(z)

Hi;The csgn function is defined like this:

Is the csgn(x) function related to sgn(x)?

Hi Wink;

What will be sgn(a+bi)?