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关于二階常微分方程解的有界性及核中含有小参数的积分方程

ON SOME PROBLEMS OF THE THEORY OF THE ORDINARY DIFFERENTIAL EQUATIONS AND THE THEORY OF INTEGRAL EQUATIONS

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【作者】 欧阳亮

【Author】 By Ou-yang Liang(Dekartment of Mathematics)

【机构】 山东大学数学系

【摘要】 <正> §1.关于二阶常微分方程解的有界性与解对方程系数的连续依赖性: 本节我们要用下列引理,即

【Abstract】 In this peper,we get nine theorems about the theory of the ordinary differential equations and the integral equations,which are collected as follows:[Theorem 1].All the solutions of the equation A(t)Y″(t)+B(t)Y′(t)+C(t)Y(t)=0 are bounded as t→∞ provided [Theorem 2].The solution u(t) of the Cauchy’s problem.and the solution U(t) of the Cauchy’s problem:must be 0≤t≤∞ provided (1) q(t)>0,q′(t)>0 t>0(2)0<a2≤p(t)≤b2<∞ p′(t)>0 t>0[Theorem 3].All the solutions of the system X(t)+A(t)X(t)=f(t,X(t),X(t)) are bounded as t→∞ provided:(1)A(t) is real symetric atrix,and its charcteristic roots λ1(t),λ2(t)…λn(t) satisfies[Theorem 4].The solutons of (v real and nonintegral numbers)satisfies provided X(t) Continuous,as 0<t<∞[Theorem 5].The solution of the integral equation satisfies the conditions(1)(2)(3) in the paper then provided[Theorem 6].When G(x,t),k(x,t)is two cotinuous symmetric kernal of the integral equation then provided(1)satisfies[Theorem 7].Suppose(2.17)(2.19)satisfies then[Teorem 8].Suppose(3.1)satisfies(1) for Every t,Si(t),is two closed and dense defined operators in H(t)(4) u(t)strong continuous in a≤t≤b and has the strong riqht Derivative D+u(t),the solution of(3.1)in H(t)is unique[Theorem 9].Suppose has a solution u(t)∈H(t)and(4)the there exist a solution of(3.1)in H(t)

  • 【文献出处】 山东大学学报(自然科学版) ,Journal of Shandong University , 编辑部邮箱 ,1963年01期
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