There is little doubt that al-Kashi was the leading astronomer and mathematician at Samarkand and he was called the second Ptolemy by an historian writing later in the same century.
Diyan ay kaunti-agam-agam na al-Kashi ay ang nangungunang astronomer at dalubbilang sa Samarkand at siya ay tinatawag na ang pangalawang Ptolemy sa pamamagitan ng pagsulat ng isang mananalaysay mamaya sa parehong siglo.