皮亚杰理论对课程设计的意义 关键词:皮亚杰理论;课程设计;滞差;活动教学法 [gap=5895]Key words :Piaget′s theory ;curriculum designing ;decalage ;activity teaching method
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证明了高维离散系统的比较原理和时滞差分不等式。
A comparison principle and new delay difference inequality are presented for high dimensional discrete systems.
考虑一类时滞差分方程的振动性，得到了该方程振动的一个充分条件。
A class of neutral difference equation with delay is considered and a sufficient condition for the oscillation of the equations is obtained.
利用两点拉伸型不动点定理给出一阶时滞差分方程周期解存在性的充分条件。
Based on the fixed point theorem of two-point extension type, sufficient conditions are derived for the existence of positive periodic solutions of delay difference equations.
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