Abu Muhammad 'Abdallah ibn Muhammad ibn Hajjaj ibn al-Yasmin al-Adrini al-Fessi () (died 1204) more commonly known as ibn al-Yasmin, was a Berber mathematician, born in Morocco and he received his education in Fez and Sevilla. Little is known of his personal life, except that he was born into an Berber family. and according to Ibn Sa'id, he was black like his mother. Since some historians have given him the surname al-Ishbili, he may have been born or grown up in Seville. Besides mathematics, he also became famous in literature, law, and particularly in Andalusian poetry.

Works

His most important work is ''Talqih al-afkar bi rushum huruf al-ghubar'' (Fertilization of Thoughts with the Help of Dust Letters ( Western Arabic Numerals)). It is a book of two hundred folios about (among other things) the science of

calculation A calculation is a deliberate mathematical process that transforms one or more inputs into one or more outputs or ''results''. The term is used in a variety of senses, from the very definite arithmetical calculation of using an algorithm, to th ...

and

geometry Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...

. He also wrote three poems (urzaja), one on algebra, one on irrational quadratic numbers, and one on the

method of false position In mathematics, the ''regula falsi'', method of false position, or false position method is a very old method for solving an equation with one unknown; this method, in modified form, is still in use. In simple terms, the method is the trial and er ...

References

Moroccan writers Berber Moroccans Berber writers Medieval Moroccan mathematicians Berber scientists 12th-century mathematicians 1204 deaths 13th-century Moroccan people 12th-century Moroccan people Year of birth unknown 12th-century Berber people 13th-century Berber people {{Morocco-scientist-stub