Adjacency Concept for Pairs of Natural Numbers

Yatsuka Nakamura

Shinshu University, Nagano

Andrzej Trybulec

Warsaw University, Bialystok

Summary.

First, we introduce the concept of adjacency for a pair of natural numbers. Second, we extend the concept for two pairs of natural numbers. The pairs represent points of a lattice in a plane. We show that if some property is infectious among adjacent points, and some points have the property, then all points have the property.

MML Identifier: GOBRD10

Contents (PDF format)

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