By George Hart for the Museum of Mathematics

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Continuing last week’s theme of mathematical coffee tables, here is one designed by Michael Serra, inspired by the work of Piet Hein.

The base consists of six pieces from a set of Hein’s SOMA puzzle, so the remaining two pieces are available as end tables. The glass top is a superellipse, a shape which Hein used for many design purposes, because it interpolates between a circle and a square.

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