Abu Sa'id Dharir Gurgani (ابوسعید ضریر گرگانی), also Gurgani, was a 9th-century Persian[1] mathematician and astronomer from Gurgan, Iran.
He wrote a treatise on geometrical problems and another on the drawing of the meridian.
George Sarton considers him a pupil of Ibn al-A'rabi, but Carl Brockelmann rejects this opinion.
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