"The Persian mathematician Muhammad ibn Ahmad al-Khwarizmi, in the year 976, stated: "If no number appears in the place of tens in a calculation, a little circle should be used to keep the rows aligned".  

This circle was called sifr (zero). The word 'sifr' in the Arabic language literally means 'empty'. He advanced the concept of zero showing that the zero could have a numerical value within a mathematical calculation. It was from this point forward that Khwarizmi was able to develop his mathematical fields, earning him the title: 'The Father of Algebra'.

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