THE DISCOVER BOGGLER
Oct 2002: Hyperspace: Up, Out, and Away





Ever since I read Flatland in 8th grade I have been entranced by the idea of four-dimensional space. Over the years I have written a paper about four-dimensional optical illusions, consulted on visual effects for feature films involving the fourth dimension, and made models of 4-d figures. My favorite 4-d creations by other people include documentary films by Brown math professor Thomas Banchoff, the novel The Boy who Reversed Himself, and Canadian animator Norman McLaren's whimsical drawings of 4-d tennis courts and houses.

Tesseract: Cube to the Fourth. A rather standard explanation of four-dimensional space by generalizing from square to cube to hypercube. Not a lot of fun as a puzzle, but important background.

4D Tictacktoe. The challenge for me was to make 4-space fun and understandable. I don't think I succeeded entirely, but I'm pleased to have found a 4-d game that I could explain in a magazine. You don't really have to understand 4-space to solve this puzzle, but it helps.

HyperCross. Martin Gardner posed the problem of counting ways of unfolding a hypercube many years ago in his column in Scientific American. One of my puzzle testers solved this difficult problem independently before finding that Gardner had already published the answer.





Copyright 2000 Scott Kim.
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