21. There are no roots on the real axis of, but there exist infinitely many pairs of roots } } for. 22. The natural replacements for concentric circles in the disk are lines parallel to the real axis in "'H " '. 23. Its orthogonal complement is given by functions for which the Fourier transform vanishes on the positive part of the real axis . 24. In contrast, the Laguerre method with a square root in its evaluation will leave the real axis of its own accord. 25. The origin of the complex plane can be referred as the point where real axis and imaginary axis intersect each other. 26. The real axis \ Im z = 0 maps to the edge of the unit disk | w | = 1. 27. The current example does not have a pole-zero pair located on the real axis , so a first order network is not required. 28. This function is harmonic on the upper half-plane ( I checked its derivatives ), but it's not defined on the real axis . 29. Imagine two copies of the cut complex plane, the cuts extending along the positive real axis from to the point at infinity. 30. Later that year he showed that M�ntz's theorem holds on every compact subset of the positive real axis of the Lebesgue measure.