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1.
Necessary and sufficient conditions are derived in order that an inequality of the form
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2.
Wanxuan Gan 《应用数学学报(英文版)》1988,4(3):245-256
In this paper, we analyse qualitatively a cubic Kolmogorov system:
which is one of the mathematical models in ecology describing the interaction between Predator-Prey of two populations; and give the conditions of nonexistence, existence and uniqueness of limit cycles for three different cases.Fulfilled during engagement in advanced studies at the Institute of Mathematics, Academia Sinica. 相似文献
3.
具强迫力的奇数阶中立型微分方程的振动性 总被引:3,自引:0,他引:3
Abstract. In this paper, the forced odd order neutral differential equations of the form are con-sidered 相似文献
4.
Sufficient conditions of solvability and unique solvability of the boundary value problem
are established, where
are measurable functions and the vector function
is measurable in the first and continuous in the last kmn arguments; moreover, this function may have nonintegrable singularities with respect to the first argument. 相似文献
5.
A. N. Murovtsev 《Ukrainian Mathematical Journal》1990,42(8):952-959
We consider the general differential-functional equations
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