A Study on Fibonacci Numbers and the Golden Ratio

Author
A. Kiruthiga, V. Manjubashini, Mohana Priya
Keywords
Fibonacci numbers; golden ratio; Fibonacci sequence; Q-matrix, Binet’s formula
Abstract
Fibonacci numbers and the golden ratio are fundamental concepts in number theory and mathematics. The Fibonacci sequence is defined by a recursive relation in which each term is the sum of the two preceding terms. The golden ratio is a mathematical constant closely related to the Fibonacci sequence. This paper presents definitions, properties, identities, and important results related to Fibonacci numbers and the golden ratio. Important identities such as the sum of Fibonacci numbers, sum of squares, Fibonacci Q-matrix, Cassini’s identity, and Binet’s formula are discussed. The relationship between Fibonacci numbers and the golden ratio is analyzed. Applications in nature, computer science, and mathematics are also presented.
References
[1] Jeffrey R. Chasnov, Fibonacci Numbers and Golden Ratio, Hong Kong University of Science and Technology (HKUST), 2015.
[2] Richard A. Dunlap, The Golden Ratio and Fibonacci Numbers, World Scientific Publishing, 1997.
[3] Keith Devlin, The Man of Numbers: Fibonacci’s Arithmetic Revolution, Walker & Company, 2011.
[4] Thomas Koshy, Fibonacci and Lucas Numbers with Application, John Wiley & Sons Ltd., Volume 2 (second edition series), 2019


Received : 11 December 2025
Accepted : 19 March 2026
Published : 29 March 2026

DOI: 10.30726/esij/v13.i1.2026.131004

Fibonacci-Numbers-ESIJ.13.1.4.pdf