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Stewart Dickson has been a user of the Mathematica(R) system for doing mathematics by computer since April, 1990, when Stephen Wolfram invited him to contribute illustrations to Mathematica, second edition, Redwood CIty: Addison Wesley Publishing, 1991.

WRI has supported the work of Stewart Dickson since 1990 for the development of images demonstrating the concretization of abstraction using Mathematica.

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