1.
Some Necessary and Sufficient Conditions of Abelian Groups and Cyclic Groups
交换群和循环群的若干充分必要条件
2.
Dual Consecutive Number is the Necessary and Sufficient Condition of a Square Integer;
二重连整数是平方数的充分必要条件
3.
A necessary and sufficient condition of(m,n)-tree;
(m,n)-树的一个充分必要条件
4.
sufficient-necessary condition about proportionalityof mean value premium principle;
平均值原理成比例性的充分必要条件
5.
The Condition of Existence Solve of Sufficient and Necessary on a Class of Diophantine Equations;
一类不定方程组有解的充分必要条件
6.
On fully essential condition of Hamilton Graph;
关于Hamilton图的充分必要条件
7.
The Necessary and Sufficient Condition for[D,φ(x),λ]=0
[D,φ(x),λ]=0的充分必要条件
8.
Necessary and Sufficient Conditions for Oscillations of a Class of Functional Differential Equations of Delayed Type;
一类滞后型泛函微分方程振动的充分必要条件
9.
A Sufficient And Necessay Condition For Integrability Of Two-order Linear Differential Equation;
二阶线性常微分方程可积的一个充分必要条件
10.
Theorem 1 and are equivalent infinitesimals if and only if .
定理1与是等阶无穷小的充分必要条件为.
11.
On the Definition of Life and the Prerequisite of the Origins of Life;
生命的定义和生命起源的充分必要条件
12.
A New Proof of the Necessary and Sufficient Condition of the Trigonometric Polynomial Identically Equals Zero;
三角多项式T(x)恒为零的充分必要条件的证明
13.
THE FULL NECESSITIES OF DEVELOPING DIGITAL LIBRARITES;
论我国发展数字图书馆的充分必要条件
14.
Necessary and Sufficient Conditions of Distinguishing the Positive Definite Matrix and Its Equivalency;
判别正定矩阵的充分必要条件及其等价性
15.
The Sufficeent and Nesessary Conditions for the Unique Steady State of the Nonlinear Nonautonomous Circuits;
非线性非自治电路唯一稳态的充分必要条件
16.
A Sufficient and Necessary Condition of 2-person Bayesian Implementation
双人贝叶斯可执行的一个充分必要条件
17.
Necessary and Sufficient Condition for the Existence of Positive Solutions of Nonlinear Second-Order Ordinary Differential Systems;
非线性二阶常微分系统边值问题正解存在的充分必要条件
18.
Necessary and Sufficient Condtions for Oscillation of First Neutral Delay Differential Equation with Positive and Negative Coefficients;
中立型具正负系数的一阶时滞微分方程振动的充分必要条件