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Open Access Research Article

Geometric progression of length four on the circle

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pp. 2025–2030Vol. 28Issue 5August 2025DOI: 10.47974/JIM-2240XML
Received:
08 Oct 2024
Published Online:
18 Aug 2025
Article type:
Research Article
Language:
EN
Article no.:
JIM-2240
Pages:
2025–2030

Abstract

A sequence of rational points (P1, P2, P3,…) on a circle is said to constitute an r-geometric progression if either the sequence of their x-coordinates {a1, a2, a3,…} or their y-coordinates {b1, b2, b3,…} forms a geometric progression with common ratio r. This article examines a specific construction of such a progression, focusing on a sequence of four points located on a circle whose center lies along the x-axis. As a consequence, it is deduced that a certain family of unit circles whose centers lie on the x-axis cannot contain a rational sequence of length four in geometric progression of the form {1, r, r2, r3}.

Keywords

Subject Classifications

11B8311B2514H5011G05

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