He was not good at algebra in middle school.

他中时不擅长代数。

Four years after he graduated from school, Tom decided to dust off his algebra book.

汤姆从业四年后, 决意重温代数。

In algebra, the sign X usually denotes an unknown quantity.

在代数里, 符号X常来表示未知数。

His classmates were labouring with elementary algebra.

他的同们正在绞尽脑汁地演算初等代数题。

As its application, a multi-component system similar to the BPT hierarchy is obtained.

最后外积的性质构造了一个3 维的loop代数 ,由此可设计出许多新的等谱问题，作为应，本文得到了一个类似的多分量的Boite-Pempinelli-Tu(BPT)族。

If you want to be a draftsman, a machinist, a molder, or a patternmaker, you'll need algebra and geometry and even trigonometry.

如果你想为手工艺人、缝纫工、造型工或制模工，你需要代数和几何，甚至三角。

Using the notion of coefficient matrix and maximal element.We prove that the Lie algebra is semi-simple and it has no abelian two dimensional subalgebra.

系数矩阵和极大项，证明了这类李代数是半单李代数且没有二维交换子代数。

Further more,we prove that the cohomotopy groups is isomorphic to K1 -group of the continuous algebra on topological boundary of bounded domains in C.

在复平面C中，任意有界域的拓扑边界上连续函数代数的K_1-群与其边界上的上同伦群同构。

The large deflection problem of cantilever beams was studied by means of the biparametric perturbation method and the first order derivative substitution from pseudolinear analysis approach.

线性分析方法中的一阶导数代换对基本方程进行了简化处理,将基本的微分积分方程转化为非线性代数方程组,并结合双参数摄动研究了悬臂梁的大挠度问题。

A hypercomplex model of acoustic vector sensor array is introduced.The hypercomplex number is used to model holistically the four output signal components of an acoustic vector sensor.

摘要将超复数代数引入矢量水听器信号处理领域，超复数来整体表示了矢量水听器输出的4个信号分量，并建立了矢量水听器阵列的超复数模型。

In this paper, we proved that the definition of a semilattice as a universal algebra and the definition of a semilattice as a partial ordered set are equivalent.

本文中，我们证明了作为泛代数的半格的定义与作为偏序集的半格的定义是等价的。

With the request of geometry modeling system and application of the concept about complexes algebraictopology in the field of industrial production , the theory of non-manifold model come into being.

工业产品几何造型技术的发展要求,以及代数拓扑复形等概念引入到几何造型中,因此产生了非流形几何造型理论。

In this paper, the conclusion is that the intersection of lie subring of a Lie group is a Lie subring is obtained, moreover,it gives the Lie algebra of the Lie subring.

文章通过李子群的性质得出了李群的两个李子群的交依然是李子群的结论,进而得出这一李子群的李代数形式。