1.
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
2.
Research on Necessary and Sufficient Conditions of Industrial Clusters;
产业集群形成的必要条件和充分条件
3.
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
4.
A Necessary and Sufficient Condition for the Existence of Positive Solutions of Fourth Order Singular Differential Equations
一类四阶奇异微分方程正解存在的充分必要条件
5.
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
6.
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
7.
A necessary and sufficient condition of(m,n)-tree;
(m,n)-树的一个充分必要条件
8.
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
9.
On fully essential condition of Hamilton Graph;
关于Hamilton图的充分必要条件
10.
The Necessary and Sufficient Condition for[D,φ(x),λ]=0
[D,φ(x),λ]=0的充分必要条件
11.
A Necessary and Sufficient Condition for the Existence of Positive Solutions to Impulsive Singular Mixed Boundary Value Problems
脉冲奇异混合边值问题正解存在的充分必要条件
12.
Results A necessary and sufficient condition for the temopral stability of steady state is provided and the necessary conditon for the bifurcation of this steady state to spatially non-uniform solution is also given.
结果获得了该类反应模型平衡态局部稳定的充要条件与系统产生一致分歧解的必要条件。
13.
A sufficient and necessary condition for the generalized Moore-Penrose inverse of a factorization matrix
分解矩阵具有广义Moore-Penrose逆的充要条件
14.
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
15.
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
16.
Once again, the trivial necessary condition is, in fact, sufficient.
事实上，这个平凡的必要条件也是充分的。
17.
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
18.
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