Golden Number and Lucas Sequence

The golden number is

image002

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There is extensive literature on the golden number which is also known as the golden ratio. The exposition in Wolfram Mathworld [http://mathworld.wolfram.com/GoldenRatio.html] is excellent. John Baez gave an interesting exposition [http://math.ucr.edu/home/baez/week203.html]. Mario Livio’s book “The Golden Ratio” is popular.

There is a property of the golden number that does not get enough attention. The general form of this property is

image004

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where n=1,2,3,4,5,… are the counting numbers and Ln are the Lucas numbers. Note that n starts from 1.

The Lucas numbers are defined by the recurrence relation

image006

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(Fibonacci numbers have the same recurrence relation but it is a different sequence 0,1,1,2,3,5,8,13,….)

Explicitly, the first five representations of this wonderful property of the golden number are:

image008

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image010

.

image012

.

image014

.

image016

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Note that these are not equations. These are mathematical identities. The term “equation” is used when we have variables. An equation relates different variables to each other. In these identities we have a number (not variable) on the left hand side and equivalent number on the right hand side. The golden number \Phi is not a variable. It is a number.

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About Suresh Emre

I have worked as a physicist at the Fermi National Accelerator Laboratory and the Superconducting Super Collider Laboratory. I am a volunteer for the Renaissance Universal movement. My main goal is to inspire the reader to engage in Self-discovery and expansion of consciousness.
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