
Cheng Yuhuai:A Research Pioneer of Differential Equation in China 

ZHAO Kuiqi,HUA Cuncai(Mathematics Institute of Yunnan Normal University,Kunming 650092,PRC) 

What's New with Reform Calculus in the US 

Louis M Friedler,Edward F Wolff(Department of Computer Science and Mathematics,Arcadia University,Arcadia 19038,USA) 

Directional Derivatives and a Necessary and Sufficient Condition for Differentiability 

SUN Jiayong(School of Science,Northwestern Polytechnical University,Xi'an 710072,PRC) 

A Conclusion on Unit Fraction 

HOU Qianmin(Supervision Office,Changjiang Professional College,Wuhan 430074,PRC) 

Arithmetic Square Root for Positive Definite Matrixes 

ZHANG Shanmei1,LIU Yan2(1.Department of Mathematics,Taiyuan Normal University,Taiyuan 030012,PRC; 2.Department of Mathematics,Heilongjiang University,Harbin 150080,PRC) 

Existence and Uniqueness of Local Solutions for a Class of ReactionDiffusion Equations 

WANG Yunhua1,LI Bing1,ZHANG Zhibei2(1.Mathematics Department,Harbin Normal University,Harbin 150025,PRC; 2.Department of Foundation,Heilongjiang Vocational Institute Minority,Harbin 150081,PRC) 

The Distribution of Sum of Random Sums 

WANG Kaiyong,QI Wenwen (School of Mathematics and Physics,Suzhou University of Science and Technology,Suzhou 215009,PRC) 

Green's Function of Sector Cylinder for Dirichlet Problem 

WANG Zhongyi(School of Science,Xi'an Shiyou University,Xi'an 710065,PRC) 

Viewing Line Integral of the Second Type from the Perspective of Complex Variable 

LONG Boyong,WANG Lianglong(School of Mathematics Science,Anhui University,Hefei 230039,PRC) 

A New Proof for Replacement Theorem 

XU Deyu(South China Business College,Guangdong University of Foreign Studies,Guangzhou 510545,PRC) 

Iterated Integration and Application 

CHANG Gengzhe(Department of Mathematics,University of Science and Technology of China,Hefei 230026,PRC) 

Applications of Rank to the Similarity of Matrices 

XIE Qihong(School of Mathematical Sciences,Fudan University,Shanghai 200433,PRC) 

A Hilberttype Inequality 

SHAO Zhihua1,ZHENG Ningguo2(1.Pinghu Institue,Zhejiang Radio and TV University,Pinghu 314200,PRC; 2.Institue of Open Education,Zhejiang Huzhou Radio and TV University,Huzhou 313000,PRC) 

Solution for a Class of Functional Differential Equations with Variable Delay 

LIN Zhuangpeng1,LIN Han2,CHEN Wenwen1(1.School of Mathematics and computational science,Shenzhen University,Shenzhen 518060 PRC;2.Department of Mathematics,Zhejiang University,Hangzhou 310058,PRC) 

Improvement of an Inequality and Applications 

MA Tongyi (School of Mathematics and Statistics,Hexi University,Zhangye 734000,PRC) 

Some Mistakes in Proving Probability Inequalities 

LIN Yun(Department of Mathematics,Jiaying College,Meizhou 514015,PRC) 

The Concordance about Definitions of Conicoid 

TAO Yingqi1,WANG Hui2(1.Department of Mathematics,Officers College of Chinese People's Armed Police Force,Chengdu 610213,PRC; 2.School of Automation,Xi'an University of Posts and Telecommunications,Xi'an 710121,PRC) 

Revisiting the Infinitesimal Comparing 

CHENG Huidong1,YIN Zuoyuan2(1.School of Science,Shandong University of Science and Technology,Qingdao,266510,PRC; 2.School of Information and Electrical,Shandong University of Science and Technology,Qingdao,266510,PRC.) 

Some Remarks on AbelPringsheim's Theorem 

ZHANG Guoming (Department of Mathematics,Mudanjiang Normal University,Mudanjiang 157012,PRC) 

Asymptotic Property of the Mean Value Point of Fifth Order Lagrange's Mean Value Theorem 

MA Xinghua(School of Science,Hebei United University,Tangshan 063009,PRC) 

Structure of Discontinuous Points of Functions 

WANG Jiajun(Tianmu college,Zhejiang Agriculture and Forestry University,Lin'An 311300,PRC) 

Summing the kth Power of Natural Numbers 

WU Lincong,MO Guoliang(Zhejiang University City College,Hangzhou 310015,PRC) 

A Note to "A Simple Method for Limits of 0~0 Type in Weaker Conditions" 

LI Yongli,HE Xiaona(Department of Fiveyears College,Henan Quality Polytechnic,Pingdingshan 467000,PRC) 

Quintic Equations Solvable by Radicals 

TANG Jian'er(Department of Applied Mathematics,Shanghai University of Finance and Economics,Shanghai 200433,PRC) 

A new Algorithm for Inverse of rcyclic Matrix 

JIANG Jiaqing(Teacher Education College,Taizhou University,Linhai 317000,PRC) 

On The Sum of A Polynomial 

LI Yuewei,LIU Ruilou(Department of Mathematics,Hebei Bohai Petrol Professional College,Renqiu 062552,PRC) 

Solving Differential Equations with Laplace Transform 

TIAN Huizhu,SONG Congzhi(Department of Basic Science,Hebei College of Industry and Technology,Shijiazhuang 050091,PRC) 

Calculation of Dirichlet integral 

FAN Jinhua(Department of Applied Mathematics,Nanjing University of Science and Technology,Nanjing 210094,PRC) 

Two Integral Transformations in Solving 1d Heat Equations 

JIN Qisheng(Department of Public Basic Courses,Anqing Vocational and Technical College,Anqing 246003,PRC) 

Converting Surface Integral of Second Type into Double Integral 

XIONG Ming1,XIONG Jian2(1.Department of Mathematics,College of Sichuan Aihua,Chengdu 610200,PRC; 2.Guanmei Middle School,Cangnan 325800,PRC) 

A Test for Spectral Radius of Matrixes 

LI Yuqing (School of science,Xi'an Technological University,Xi'an 710032,PRC) 

Criteria for the Existence of Higher Derivatives of Piecewise Functions 

ZHANG Jinfeng,LI Dexin(School of Computer and Information Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,PRC) 

The Mathematical Model of Radiation Heating for Steel Wire 

SHEN Zhijun (Xianyang BOMCO Steel Tube & Wire Rope Co.,Ltd.,,Xianyang 712000,PRC) 

An Intuitive Model and Properties of Supremum and Infimum 

LIU Xiumei (Department of Elementary Education,Lianyungang Teachers College,Lianyungang 222006,PRC) 

Simulation of Nonhomogeneous Poisson Processes 

NING Ruyun(Department of Basic Courses,Ordnance Engineering College,Shijiazhuang 050003,PRC) 

Distance of Two Points in the Unit Circle 

XIAO Huayong,LI Xu(Department of Mathematics,Northwestern Polytechnical university,Xi'an 710072,PRC) 

Significance of Mathematics Education in Higher Vocational Colleges 

GUO Xinhong(Culture Fundamental Department,Liaoning Finance Vocational College,Shenyang 110122,PRC) 

Application of Change Formula Teaching in Teaching Higher Mathematics 

HE Ying(Department of Aeronautical Mechanism,Naval Aeronautical Engineering Institute Qingdao Branch,Qingdao 266041,PRC) 

Series of Exploring Issues on Mathematical Analysis for Engineering and Excellent Case 

YANG Xiaoyuan1,FAN Zipei2,SUN Yuquan1 (1.School of Mathematics and System Science,Beihang University,Beijing 100191,PRC; 2.School of Computer Science and Engineering,Beihang University,Beijing 100191,PRC) 

Reduction Thinking in Linear Algebra 

XIE Hongmei(Teachers College,Shihezi University,Shihezi 832003,PRC) 

Analysis of Teaching Methods and Effectiveness in College Mathematics 

DAI Guoxing(School of Science,Jiangsu University,Zhengjiang 212013,PRC) 

On the Roles of Sequential Idea in Teaching Mathematical Analysis 

WANG Weidong(Department of Mathematics,China Three Gorges Univeristy,Yichang 443002,PRC) 

A Brief Introduction to Limit Superior and Limit Inferior for Sequences of Sets 

CHANG Yaozhi(School of Science,Xi'an University of Science and Technology,Xi'an 710054,PRC) 

The Department of Mathematics of ECNU in 1950s 

ZHANG Dianzhou(Department of mathematics,East China Normal University,Shanghai 200062,PRC) 

A Comparative Study of the Translations of the book "A College Algebra" 

ZHANG Wei1,DONG Jie2 1.Department of Mathematics,Jining teachers College,Wulanchabu 012000,PRC; 2.Institute for the History of Science and Technology,Inner Mongolia Normal University,Hohhot 010022,PRC) 