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Abu Haiyan Asirudin Mohammad Ibn Yusefibn Au Ibn Juan Andulusi Gharnati, was born at the end of safar in 654 in Ghanateh and died in 28th safar in 745 A.H. Abu Haiyan had a special approach in syntax. He immitated no school completely and constantly rather he himself was an authority.
His most important characteristic was his apparent and his influence in his syntactical tendencies. He is greatly in fluenced by the school of Basra especially by syhavey and he has exploited his ideas in the justification of his opinions.
His ideas can he divided into Iwo sections:
1. His personal ideas which he has acquired them personally and based on the induction and personal investigation.
2- His investigative ideas which refers to the ideas that Abu Haiyan has selected among the ideas of previous scientists and has prefered them over others.