The difference between the two is known as compass variation. 二者之間的差異就是聞名的指南針偏差。
Consider the nonlinear delay partial difference equations with continuous arguments Some oscillation criteria of this equation are obtained. 研究具有連續變量的非線(xiàn)性時(shí)滯偏差分方程獲得了方程的一些振動(dòng)準則。