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Number System Definition, Types, Conversion, Examples, Facts The existence of complex numbers was not completely accepted until Caspar Wessel described the geometrical interpretation in 1799. Carl Friedrich Gauss rediscovered and popularized it several years later, and as a result the theory of complex numbers received a notable expansion. The idea of the graphic representation of complex numbers had appeared, however, as early as 1685, in Wallis's De algebra tractatus. In the 1960s, Abraham Robinson showed how infinitely large and infinitesimal numbers can be rigorously defined and used to develop the field of nonstandard analysis. As recently as the 18th century, it was common practice to ignore any negative results returned by equations on the assumption that they were meaningless. Methods that generate true random numbers also involve compensating for potential biases caused by the measurement process. A random number is a number chosen from a pool of limited or unlimited nu