梅文鼎(1633-1721),字定九,号勿庵,明崇祯六年二月七日(1633年3月16日)生于安徽宣城(今宣州市),他是中国清初天文学家、数学家,为清代“历算第一名家”和“开山之祖”。他专心致力于天文数学的研究,曾在臬台金长真幕下当教席。在天文、数学方面的成果丰硕,有《明史历志拟稿》、《历学疑问》、《古今历法通考》、《勿庵历算书目》等80余种著 Mei Wending (1633-1721), the word Dingjiu, No. not Um, Ming Chong Zhen February 7, six years (March 16, 1633) was born in Anhui Xuancheng (now Xuanzhou City), he is the early Qing Dynasty Astronomer, mathematician, for the Qing Dynasty “calendar first name ” and “the founder of the mountains ”. He devoted himself to the study of astronomy and mathematics, and was a teacher under the stage of Jin Chang of Taiwan. In the astronomy, mathematics has achieved fruitful results, such as “the history of Ming Dynasty draft”, “historical questions”, “ancient and modern calendar test”, “do not annotate the bibliography” more than 80 kinds of