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Example sentences from the Web for Z0
A case of such a function ƒ(x, y) is the radius r0 of the neighbourhood proper to any point z0, spoken of above.
In other words, the original series may legitimately be differentiated at any interior point z0 of its circle of convergence.
Z0 is the zenith distance of the moon's center midway through the hour of observation, that is, at the half hour.A Quantitative Study of the Nocturnal Migration of Birds.|George H. Lowery.