必要条件

The positive law of society, which is with us the municipal law of England, directs it to vest in such person as the last proprietor shall by will, attended with certain requisites, appoint; and, in defect of such appointment, to go to some particular person, who, from the result of certain local constitutions, appears to be the heir at law.

社会的肯定性法律，与我们相伴的英格兰的自治法律，指示应当授予最近所有者的意志所确定的人，加之以确定的必要条件，进行指定；在这样的指定所产生的缺陷中，根据确定的自治原则所确定的某些个人，将成为法律上的继承人。

We first state general linear model, ridge-type estimator and general ridge-type estimator, and the constraint biased estimator. And then, we introduce some basic theory about matrix and some conclusion about the admissibility of estimator in Gauss-Markov model. In the third chapter, we discussion several equivalent characterization of the best linear unbiased estimation, we proved that admissible characterization of admissible of linear estimation is as conditional general ridge-type estimation in general linear model. A necessary and sufficient condition that homogeneous linear estimator is admissible estimator is obtained.

本文首先概述了一般线性模型，岭估计及约束岭估计的发展历史和研究现状，在第二章介绍了矩阵的一些基本知识和可容许性的一些基本结论，第三章讨论了一般线性模型最佳线性无偏估计的几个等价条件，以及线性估计的可容许性特征，得到了一般线性模型的可容许线性估计均具有条件广义岭估计的形式，给出了一个齐次线性估计为可容许估计的充分必要条件。

Math: any binary relation that is complete, transitive, and continuous can be represented by a continuous real-valued utility function

效用指数，效用函数的存在性：理性是必要条件；连续性是充分条件，效用函数也是连续函数。

In this paper, we study a necessary and sufficient condition that complete bipartite graph exists factors.

讨论了完全偶图存在 [1，2 ]因子的充分必要条件，并给出了 [1，2 ]因子的计数

Based on the invariance of maximum likelihood estimation, the sufficient and necessary condition under which the maximum likelihood estimation has invariance for the parameters are given, then it uses this conclusion to calculate the maximum likelihood estimation of σ^2 and ρ for bivariate normal distribution.

根据参数极大似然估计不变性原则，给出在一定条件下极大似然估计具有不变性的充分必要条件，并利用该结论计算了二元正态分布Z=的未知参数σ^2和ρ的极大似然估计值。

Generalized ε- correlation Immune Boolean Vector Functions ...

定理1 告诉我们布尔向量函数具有m 阶广义ε相关免疫性的一个必要条件是它各分量函数的。。。。。

Theorem 1 A series of nonnegative terms converges if and only if it's partial sums are bounded above.

定理1 正项级数收敛的充分必要条件是：它的部分和数列有上界。

The shoulders for any set are commonly the most visually representative, they're the most visible at any distance, and as they allow a lot of space compared to say a leg or bracer item, we commonly take them and really create something visually impressive.

都是第3季度的装备，等级将不再是继续使用装备所必要条件，只能是最初购买它的条件。。。现在，自从我们暴雪宣布后，大多数的人都说，武器是可以接受的，但是肩膀显然的要被提出一些疑问。

For one of the necessary conditions of preservation is quick burial

因为保存的必要条件之一是迅速掩埋

When there is a buyer's market, the provision of a bond can be

如果是买方市场，则提供保函可作为同意签订合同的必要条件。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。