求解方程根的函数和一些微分方程迭代的函数，包括：求实系数代数方程全部根的牛顿-下山法，全区间积分的定步长龙格-库塔法，积分一步的变步长龙格-库塔法，积分一步的变步长基尔方法，求实系数代数方程全部根的qr方法-Solving the root of the function equations and some differential equations iteration function, including: realistic coefficient algebraic equations all root Newton- downhill law, the region between the points of fixed-step Changlong grid- Kutta method, integral variable step by step Changlong grid- Treasury Tajikistan law, integral variable step by step method of Kiel, truth-seeking coefficient algebraic equations all root qr method