An Infinite Sequence of Identities Equating the Sum of Squares of Lucas Numbers with the Sum of Squares of Fibonacci Numbers

Description: This research presents a newly discovered relationship between two famous mathematical sequences: the Lucas numbers and the Fibonacci numbers. The author identifies and proves a specific infinite sequence of identities where the sum of squares of any two consecutive Lucas numbers is exactly equal to the sum of squares of two specific Fibonacci numbers. Specifically, it is shown that the sum of the square of the n-th Lucas number and the square of the (n+1)-th Lucas number is identical to the sum of the square of the (n+3)-th Fibonacci number and the square of the (n-2)-th Fibonacci number. The article includes: A detailed introduction to the relationship between these quadratic forms. A comprehensive numerical verification table covering the first twenty instances of the identity, demonstrating its absolute accuracy. A formal mathematical proof using Binet's formula to establish the validity of the identity for all integers n. This work offers a fresh, symmetric perspective on the deep structural connections within integer sequences related to the Golden Ratio.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-04-12
DOI
https://doi.org/10.5281/zenodo.19544090
Primary Topic
Advanced Mathematical Theories and Applications
Type
article
Field-Weighted Citation Impact
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article

An Infinite Sequence of Identities Equating the Sum of Squares of Lucas Numbers with the Sum of Squares of Fibonacci Numbers

Emma Helmdach
Zenodo (CERN European Organization for Nuclear Research)
Advanced Mathematical Theories and Applications
article

An Infinite Sequence of Identities Equating the Sum of Squares of Lucas Numbers with the Sum of Squares of Fibonacci Numbers

Emma Helmdach
article en

Abstract

Description: This research presents a newly discovered relationship between two famous mathematical sequences: the Lucas numbers and the Fibonacci numbers. The author identifies and proves a specific infinite sequence of identities where the sum of squares of any two consecutive Lucas numbers is exactly equal to the sum of squares of two specific Fibonacci numbers. Specifically, it is shown that the sum of the square of the n-th Lucas number and the square of the (n+1)-th Lucas number is identical to the sum of the square of the (n+3)-th Fibonacci number and the square of the (n-2)-th Fibonacci number. The article includes: A detailed introduction to the relationship between these quadratic forms. A comprehensive numerical verification table covering the first twenty instances of the identity, demonstrating its absolute accuracy. A formal mathematical proof using Binet's formula to establish the validity of the identity for all integers n. This work offers a fresh, symmetric perspective on the deep structural connections within integer sequences related to the Golden Ratio.

Zenodo (CERN European Organization for Nuclear Research)
Openalex Percentile: Top 5%
Advanced Mathematical Theories and Applications
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