The design of slowly shrinking labelled squares
Author: Elwyn R. Berlekamp
Journal: Math. Comp. 29 (1975), 25-27
MSC: Primary 05B30; Secondary 10A35
MathSciNet review: 0373933
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Abstract: This paper considers the nonlinear operator T, which acts on 4-dimensional vectors with nonnegative real components. T transforms such a vector into a new vector whose components are the magnitudes of the differences of cyclically adjacent pairs of components of the previous vector. We show that T is not nilpotent.