A Fractal Celtic Key Pattern?
Paul Gailiunas

Proceedings of Bridges 2010: Mathematics, Music, Art, Architecture, Culture
Pages 293–298
Regular Papers

Abstract

A particular Celtic key pattern, dating from around 1000 AD, displays conspicuous self-similarity, which can be developed in a natural way to any depth of recursion. Such self-similar structures, although rare, are not unknown in the medieval period, but it is unlikely that there was a well-developed concept of recursion at that time.

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