No mathematician is infallible;he may make mistakes,but he must not hedge.

没有一位学是一贯正确的;他可能误,但他绝不回避任何一个问题。

An eminent musicologist, mathematician and calendarist, who was honored to be “oriental personage of artistic encyclopedia type”.

明代杰出乐律、算学和历学，被西方赞誉为“东方百科艺术全书式的人物”。

This thesis makes an exposition of the mathematics logicism thought of Russell ,the great mathematician and logician in phytogeny of logic.

本文对伟大的学和逻辑学伯特兰·罗素的学逻辑主义思想进行了研究和探讨。