一个广义Bihari型不等式及其应用

本文对定义于一定有序局部紧空间上的向量值函数建立一个Ｂｉｈａｒｉ型积分不等式，并给出其对于非线性Ｖｏｌｔｅｒｒａ型积分方程的若干应用。     

倒向随机微分方程解的比较定理

毛学荣新近将彭实戈和Ｐａｒｄｏｕｘ关于倒向随机策分方程解的存在性定理推广到非Ｌｉｐｓｃｈｉｔｚ系数情景,此文将彭实戈的比较定理推广到这一情形,主要工具是Ｔａｎａｋａ－Ｍｅｙｅｒ公式,Ｄａｖｉｓ不等式和Ｂｉｈａｒｉ不等式。     

含多重积分的Volterra型积分方程与不等式

本文考虑一定有序局部紧空间上含多重积分的Ｖｏｌｔｅｒｒａ型积分方程，给出了此类方程可解的充分条件，建立了相应的积分不等式．本文结果包含许多已知结论作为特殊情况．     

某些非线性积分不等式

本文考虑一定有序局部紧空间上的非线性积分不等式，并给出其对于一定非线性积分方程的应用．     

数学问题解答

数学问题解答１９９４年４月号问题解答（解答由问题提供人给出）８８６在△ＡＢＣ中，求证：证当△ＡＢＣ为钝角三角形或直角三角形时不等式的左边小于或等于零，而右边大于零，不等式显然成立．当△ＡＢＣ为锐角三角形时同理将这三个同向不等式相乘得．８８７证明方程ｍ...     

关于双特征Beltrami方程

该文研究空间Ｂｅｌｔｒａｍｉ方程的推广形式，即双特征Ｂｅｌｔｒａｍｉ方程．利用外微分形式与矩阵的外代数等工具，将双特征Ｂｅｌｔｒａｍｉ方程转化为一个非齐次的狆 调和方程，转化过程中只用到加于特征矩阵的一致椭圆型条件．然后验证了算子犃满足的条件：Ｌｉｐｓｃｈｉｔｚ型条件、单调不等式、齐次性条件以及算子犅满足的控制增长条件．并利用得到的狆 调和方程，给出了双特征Ｂｅｌｔｒａｍｉ方程广义解分量函数的弱单调性结果．     

C~n中的Zygmund－Calderon不等式

本文利用多复变函数论中一系列的积分表示．对具有紧支集的（０，１）形式建立了Ｃｎ中的Ｚｇｇｍｕｎｄ－Ｃａｌｄｅｒｏｎ不等式．作为这一个不等式的一个直接应用，文［９］得到了Ｃｎ中Ｂｅｌｔｒａｍｉ方程组的整体同胚解．     

关于Ou—Iang型非线性积分不等式

对Ｂ．Ｃ．Ｐａｃｈｐａｔｔｅ在「２」中和Ｙａｎｇ Ｅｎｈａｏ在「４」中给出的推广的Ｏｕ－Ｉａｎｇ积分不等式作进一步研究,给出了两个具有更广泛意义的Ｏｕ－Ｉａｎｇ型非线性积分不等式及其应用。     

复超球Bergman空间和Bloch空间上的Carleson不等式

本文研究了复超球上Ｃａｒｌｅｓｏｎ测度的特征．特别是用Ｂｅｒｇｍａｎ函数和Ｂｌｏｃｈ函数的导数的积分性质刻画了Ｃａｒｌｅｓｏｎ测度，并建立了复超球上的Ｂｅｒｇｍａｎ空间和Ｂｌｏｃｈ空间的Ｃａｒｌｅｓｏｎ不等式．     

一类积分方程的稳定性与吸引域

本文通过建立非线性积分不等式,讨论了一类具有时滞积分方程的渐近稳定性．获得了简捷而实用的充分准则,并给出了确定吸引域的方法．     

On the quadrature methods for the numerical solution of singular integral equations

A Cauchy type singular integral equation can be numerically solved by the use of an appropriate numerical integration rule and the reduction of this equation to a system of linear algebraic equations, either directly or after the reduction of the Cauchy type singular integral equation to an equivalent Fredholm integral equation of the second kind. In this paper two fundamental theorems on the equivalence (under appropriate conditions) of the aforementioned methods of numerical solution of Cauchy type singular integral equations are proved in sufficiently general cases of Cauchy type singular integral equations of the second kind.     

Integral Equations in Measure Spaces

In this paper, we consider a class of integral equations in measure spaces, and the corresponding integral inequalities. Special cases are Volterra type integral equations and Gronwall type integral inequalities. We give different necessary and su.cient, and only su.cient conditions which together with the Lipschitz condition imply the existence and the uniqueness of solutions of the considered integral equations. We study the successive approximations for the considered integral equations. We derive estimates for the solutions of the studied integral equations and integral inequalities. Submitted: June 20, 2000?Revised: July 10, 2001     

On Denjoy type extensions of the Pettis integral

In this paper two Denjoy type extensions of the Pettis integral are defined and studied. These integrals are shown to extend the Pettis integral in a natural way analogous to that in which the Denjoy integrals extend the Lebesgue integral for real-valued functions. The connection between some Denjoy type extensions of the Pettis integral is examined.     

A Feng Qi type inequality for Sugeno integral

In this paper, a Feng Qi type inequality for Sugeno integral is shown. The studied inequality is based on the classical Feng Qi type inequality for Lebesgue integral. Moreover, a generalized Feng Qi type inequality for Sugeno integral is proved with several examples given to illustrate the validity of the proposed inequalities.     

Stieltjes integral inequalities of Gronwall type and applications

Summary We obtain estimates for solutions of integral inequalities of Gronwall type involving Stieltjes integrals and their inverse inequalities. From these we obtain some new results for integral inequalities for Riemann integrals and functional integral inequalities. Extensions are also given to Bihari type integral inequalities.Research supported by NSERC Canada.     

On the Chebyshev type inequality for seminormed fuzzy integral

The Chebyshev type inequality for seminormed fuzzy integral is discussed. The main results of this paper generalize some previous results obtained by the authors. We also investigate the properties of semiconormed fuzzy integral, and a related inequality for this type of integral is obtained.     

On the numerical solution of Cauchy type singular integral equations by the collocation method

The collocation method for the numerical solution of Fredholm integral equations of the second kind is applied, properly modified, to the numerical solution of Cauchy type singular integral equations of the first or the second kind but with constant coefficients. This direct method of numerical solution of Cauchy type singular integral equations is compared afterwards with the corresponding method resulting from applying the collocation method to the Fredholm integral equation of the second kind equivalent to the Cauchy type singular integral equation, as well as with another method, based also on the regularization procedure, for the numerical solution of the same class of equations. Finally, the convergence of the method is discussed.     

New Convolutions for Quadratic-Phase Fourier Integral Operators and their Applications

We obtain new convolutions for quadratic-phase Fourier integral operators (which include, as subcases, e.g., the fractional Fourier transform and the linear canonical transform). The structure of these convolutions is based on properties of the mentioned integral operators and takes profit of weight-functions associated with some amplitude and Gaussian functions. Therefore, the fundamental properties of that quadratic-phase Fourier integral operators are also studied (including a Riemann–Lebesgue type lemma, invertibility results, a Plancherel type theorem and a Parseval type identity). As applications, we obtain new Young type inequalities, the asymptotic behaviour of some oscillatory integrals, and the solvability of convolution integral equations.     

THEORY OF SINGULAR POINTS OF ORDINARY DIFFERENTIAL EQUATIONS IN COMPLEX DOMAIN

In this paper, the topological of integral surfaces near certain of Lyapunov type singularpoints and certain type of nodes of ordinary differential equations in complex domain are studied.We introduce Briot-Bouquet transformation, in order to study the topological structure of integralsurfaces near higher order singular points. At last we give an estimate of the makimum numberof isolated limit integral surfaces passing through certain type of higher order singular points.     

基于球坐标计算第一型曲面积分注记

给出了利用球坐标求解第一型曲面积分的方法及在球坐标系下第一型曲面积分转化为二重积分的公式,实例表明这种方法是可行的.此研究丰富了第一型曲面积分的计算方法,也可为在高校《高等数学》课程教学中对学生能力的培养提供素材.