G.6.4.2 The csqrt functions

1

• csqrt(conj(z)) = conj(csqrt(z)).

• csqrt((+-)0 + i0) returns +0 + i0.

• csqrt(x + i (inf)) returns +(inf) + i (inf), for all x (including NaN).

• csqrt(x + iNaN) returns NaN + iNaN and optionally raises the “invalid” floating- point exception, for finite x.

• csqrt(-(inf) + iy) returns +0 + i (inf), for finite positive-signed y.

• csqrt(+(inf) + iy) returns +(inf) + i0, for finite positive-signed y.

• csqrt(-(inf) + iNaN) returns NaN (+-) i (inf) (where the sign of the imaginary part of the result is unspecified).

• csqrt(+(inf) + iNaN) returns +(inf) + iNaN.

• csqrt(NaN + iy) returns NaN + iNaN and optionally raises the “invalid” floating- point exception, for finite y.

• csqrt(NaN + iNaN) returns NaN + iNaN.