# Extraction de la racine carree d'un entier naturel chez al-Baghdadi

## TL;DR

This paper explores al-Baghdadi's detailed numerical algorithm for extracting square roots of integers, highlighting its historical significance and its connection to earlier methods like those of al-Khwarizmi, which still influence modern computing.

## Contribution

The paper presents a comprehensive analysis of al-Baghdadi's method for square root extraction, emphasizing its historical importance and detailed numerical approach compared to earlier works.

## Key findings

- Al-Baghdadi's method is more complete and detailed than predecessors.
- The algorithm has historical significance and is related to modern square root calculations.
- It remains relevant in computational tools today.

## Abstract

Between the ninth and fifteenth centuries, several Arab mathematicians studied numerical algorithms on integers. The extraction of the square root of an integer is based on an algorithm known at least since al-Khwarizmi (died around 850) which presents it in the framework of the decimal system of position theory, in his work the Indian calculus (al hisab al-hindi). Although this algorithm is less democratized than the four usual operations of arithmetic, it has experienced the same posterity, since it is still implemented today in our calculators and computers. We have chosen to expose the work of Al-Baghdadi, on the extraction of the square root of integers. His approach is purely numerical, it is more complete and more detailed than the works of its predecessors. We will highlight the interest of al-Baghdadi's text.

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Source: https://tomesphere.com/paper/1906.07964