Medieval Middle East Mathematics Contributions

Something a mathematician uses today is algebra.  Algebra helped mathematicians find unknown numbers.  Algebra was created by an Arab named Al - Khwarizmi.  His book on algebra was used in schools all the way up to the 18th century.  Medieval Muslims created the number zero.  Mathematicians needed to know the concept of zero.  This helped them write larger numbers.  The number zero is still used in our daily life.