complex-zero -- r7rs Type real-zero:
rational-zero:
integer-zero:
number-not-inf-not-nan;number-not-inf;number;number-not-nan;number-positive-or-zero-not-inf;number-positive-or-zero;number-negative-or-zero-not-inf;number-negative-or-zero;complex-not-inf;complex;complex-not-nan;(lambda (value) (and (complex? value) (zero? value)))