کارشناس ارشد تاریخ علم، دبیر ریاضی آموزش و پرورش کاشان
عنوان مقاله [English]
Ab? H??tam Muz?affar Asfiz?r? (5th and 6th centuries A.H.), the great Iranian mathematician, astronomers and scholors, was a contemporary of Khayy?m. We don’t know much about his life excert what has been mentioned in some historians’ and scholars’, works. Amony his most remarkable scientific achievements, we can mention his role in vernal equinox in order to modify and improve chronology and Jal?l? Calender. Although, unfortumately, some of his works have still not been discovered or have been lost, he has some works in different fields such as Mathematics, mechanics, weight measurement, cosmology and botany.
In this article, two separate theses are presented, which were amony Asfiz?r? ,s lost works. The first thesis is an Arabic mathematical one called “Borh?n ?al? Jam ?a-i al-Morabb ?a?t-i al- Motiv?l?ah” focusing on geometrical proving of the total squares numbers. The second thesis is a Persian one called “Ris?lat-i al- Shabakah” in botany, focusing on analysis of a plant parts and surveying vessel network system in plant and the way leaves and fruit are fed through these vessles. This significant thesis show how Islamic scholors, despite having no accurate instruments, had looked profoundly and scientifically in natural issues.