Abstract
IN connexion with the note in NATURE of December 31, p. 1151, Mr. Stefan Bergmann writes to point out how films might be used to illustrate the theory of functions of two complex variables. Each complex variable may be represented as a point in a plane, requiring two dimensions, so two such variables require four dimensions. We may obtain these by taking three dimensions in space and one in time, in fact by making a film showing a solid body the dimensions of which vary with the time. Full details were given by Mr. Bergmann some years ago (J. deutsch. Mathematiker Verein., 42, 238; 1932-33), but so far as we are aware no such films appear in current lists of those available for sale or hire.
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Mathematical Films. Nature 143, 155 (1939). https://doi.org/10.1038/143155a0
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DOI: https://doi.org/10.1038/143155a0