Who first studied the sum of squares of integers?

[Amer]

I would like to know some history on the subject like who is the first to think about sum of squares of integers and what he/she was thinking about. I think maybe it is related to Pythagorean triples. Thanks

 

[Sudharaka]

I would like to know some history on the subject like who is the first to think about sum of squares of integers and what he/she was thinking about. I think maybe it is related to Pythagorean triples. Thanks

Hi Amer,

A small bit of history about this is given in the following Wikipedia article and perhaps by following the links to the references (such as the book "History of the theory of Numbers") you might be able to learn more.

https://en.wikipedia.org/wiki/Fermat's_theorem_on_sums_of_two_squares