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We are concerned at first with a class of oscillatory functions, which are not necessarily solutions of differential equations. Using some properties of these functions, we discuss forced oscillations and relative oscillations for the equation y″(x) p(x)y(x)=f(x). A correlation with respect to oscillations between p and f is disclosed. 相似文献
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Using an approach proposed in [3],we consider some linear and nonlinear problems forviscoelastic rods.Results in [1]for linear case are affirmed more elamentarily and simplyhere.We also treat linear problem with damping term and nonlinear problem with powernonlinearity Pu~3. Some new results are established. 相似文献
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本文讨论[1]中处理粘弹性杆非线性固有值问题时遇到的一些线性积分微分方程。它们在已有的文献中似不曾系统地被研究过。也缺乏这里的一般性。 相似文献
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本文用另一途经,即结合摄动法与积分方程,讨论了粘弹性杆的非线性固有值问题,证明了具无限重数的非可列无限个固有值的存在。这种处理方法适合用于相当一般的情况. 相似文献
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本文讨论振荡函数在一些运算下保持振荡性的问题,并由此考虑二阶线性常微分方程的受迫振荡与相对振荡,揭示恢复力p(x)与外力f(x)间的联系。 相似文献
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