1.
The Littlewood Problem and Problem of Existence of Gabor Frames;
Littlewood问题和Gabor框的存在性问题
2.
Research on the Existence of Solutions of Nonlinear Differential Equations;
非线性微分方程解的存在性问题研究
3.
Existence of a Solution for a Semilinear Elliptic Equation;
一类半线性椭圆方程解的存在性问题
4.
Some Problems Concerning Function Inlegrability and Primitive Function Existence;
关于函数可积性与原函数存在性问题
5.
The Existence of Solutions for a Class of Elliptic Equation
一类拟线性椭圆方程解的存在性问题
6.
On the existing problems in the geometry;
画出来就存在吗?——谈几何中的存在性问题
7.
The Problem of Periodic Solutions for Second Order Duffing Equation with Deviating Argument;
二阶时滞Duffing型方程周期解存在性问题
8.
The Existence and the Non-existence of Global Solutions of a Free Boundary Problem;
一个自由边界问题整体解的存在性和不存在性
9.
Existence and Multiplicity of Positive Solutions for Periodic Boundary Value Problems;
周期边值问题正解的存在性与多解性
10.
The Existence and Multiplicity of Positive Solutions for Generalized Sturm-Liouville Boundary Value Problems;
广义Sturm-Liouville问题正解的存在性与多解性
11.
Existence of Solutions for Some Kinds of Nonlinear Multi-point Boundary Value Problems
几类非线性多点边值问题解的存在性
12.
Existence of Positive Solutions to a Class of Nonlinear P-Laplacian Vector Boundary Value Problems
一类非线性边界值问题正解的存在性
13.
The Existence of Solution to a Third-order Boundary Value Problem
一类非线性三阶边值问题解的存在性
14.
the present difficulties, problems, uncertainties, etc
目前存在的困难、 问题、 不稳定性等
15.
EXISTENCE OF SOLUTIONS OF SINGULARLY PERTURBED BVP FOR SOME VECTOR SYSTEM
一类向量奇摄动边值问题解的存在性
16.
Existence of Shock Front Solution to 2-Dimensional Axially Symmetric Piston Problem;
二维轴对称活塞问题激波解的存在性
17.
On the Existence of Positive Solutions of Boundary Value Problems (for Systems) of Differential Equations;
微分方程（组）边值问题正解的存在性
18.
Global Existence of Solutions for the Initial Value Problem of the Kawahara Equation;
Kawahara方程初值问题解的整体存在性