Abu Said Gorgani
Abu Sa'id Dharir Gurgani (ابوسعید ضریر گرگانی), also Gurgani, was a 9th-century Persian 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.