The global inverse function theorem is applied for the existence and uniqueness of periodical solutions to the semilinear boundary value problems . some results are improved 摘要本文运用整体反函数理论证明了一类半线性方程边值问题周期解的存在唯一性,推广和改进了已有的一些结果。
The first function returns a probability value associated with a t statistic based upon the students t distribution , while the second inverse function computes the t statistic corresponding to a given alpha setting 第一个函数根据学生的t分布返回了与t统计值相关的概率值,而第二个反函数计算了与给定的alpha设置相对应的t统计值。
With the adding of appropriate conditions , we present in this note a sharper range of inverse function . this is of important to nonlinear analysis and numerical feasibility appraisal 本文通过附加适当的条件,刻划了反函数的存在域大小,这种存在域对非线性分析中研究解的存在性、解的估计及非线性方程组求解的数值可行性都有一定的意义
Considering the difference - resisting capacity of power function in classic s - box , we substitute the inverse function by better power function . we prove that these change do not influence the difference resisting capacity from the theory 其次考虑到经典s盒中幂函数的抗差分攻击能力,我们用幂函数取代rijndael算法中s盒的求逆运算。
a function obtained by expressing the dependent variable of one function as the independent variable of another; f and g are inverse functions if f(x)=y and g(y)=x