数学公式库--非常不错 The GNU Scientific Library (GSL) is a collection of routines for numerical computing. The routines have been written from scratch in C, and present a modern Applications Programming Interface (API) for C programmers, allowing wrappers t

高等数学常用的公式，包括积分、三角、微分公式，是考试必背的公式。-The higher mathematics commonly used formula, including the integral, the triangle, the differential formula, is the formula which the test must carry.