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Infinity is an abstract term, used in philosophy to describe something that “has no limits,” is “unreachable,” or “inexhaustible”. From a mathematician’s point of view, infinity is not a number, but rather an additional symbol depicting amounts larger than describable by numbers, explains Mart Abel, the Professor of mathematics at the Tallinn University School of Digital Technologies. See more at: http://www.tlu.ee/en/News/4144/mart-abel-what-is-infinity