posted @ 2019-04-08 11:02
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posted @ 2019-04-08 10:53
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量子杨-Baxter方程新解系的一般量子偶构造_爱学术 https://www.ixueshu.com/document/f3385115a33571aa318947a18e7f9386.html
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posted @ 2019-04-04 17:45
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COMSOL_百度百科 https://baike.baidu.com/item/COMSOL/10943148?fr=aladdin 显著特点 显著特点 ■ 求解多场问题 = 求解方程组,用户只需选择或者自定义不同专业的偏微分方程进行任意组合便可轻松实现多物理场的直接耦合分析。 ■ 完全开放的架构
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posted @ 2019-04-04 17:41
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托布利兹变换 toeplitz 变换 算术平均变换
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posted @ 2019-04-02 11:47
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http://www.math.ubc.ca/~cass/courses/m446-05b/dedekind-book.pdf#page=15
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posted @ 2019-04-02 09:04
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确界原理 supremum and infimum principle 戴德金定理 Dedekind theorem http://www.math.ubc.ca/~cass/courses/m446-05b/dedekind-book.pdf#page=15 continulity and irr
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posted @ 2019-04-02 09:03
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http://www.math.purdue.edu/about/purview/spring95/conjecture.html A Layman's Perspective of Abhyankar's Conjecture by Ganapathy Sundaram Consider a po
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posted @ 2019-03-29 15:48
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algebraically closed field https://en.wikipedia.org/wiki/Algebraically_closed_field As an example, the field of real numbers is not algebraically clos
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posted @ 2019-03-29 15:01
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posted @ 2019-03-28 18:41
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Shell实现判断进程是否存在并重新启动脚本 - superbfly的专栏 - CSDN博客 https://blog.csdn.net/superbfly/article/details/52513765 #! /bin/bash # author caoxin # time 2012-10-10
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posted @ 2019-03-28 13:49
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https://zh.wikipedia.org/wiki/同胚
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posted @ 2019-03-27 11:35
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小结: 1、流形(英语:Manifolds)一般可以通过把许多平直的片折弯并粘连而成,是局部具有欧几里得空间性质的空间,是欧几里得空间中的曲线、曲面等概念的推广 2、描述一个流形往往需要不止一个“地图”,因为一般来说流形并不是真正的欧几里得空间。举例来说,地球就没法用一张平面的地图来合适地描绘。 h
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posted @ 2019-03-27 09:44
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https://en.wikipedia.org/wiki/Rodrigues%27_formula https://en.wikipedia.org/wiki/Rodrigues%27_rotation_formula 旋转
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posted @ 2019-03-26 16:52
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http://groups.csail.mit.edu/graphics/classes/6.837/F03/lectures/04_transformations.ppt https://groups.csail.mit.edu/graphics/classes/6.837/F03/lecture
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posted @ 2019-03-26 11:04
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https://en.wikipedia.org/wiki/Canonical_form#Linear_algebra Suppose we have some set S of objects, with an equivalence relation R. A canonical form is
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posted @ 2019-03-25 14:49
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https://en.wikipedia.org/wiki/Underdetermined_system https://en.wikipedia.org/wiki/Constraint_counting In mathematics, constraint counting is counting
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posted @ 2019-03-25 09:07
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https://en.wikipedia.org/wiki/LU_decomposition One way to find the LU decomposition of this simple matrix would be to simply solve the linear equation
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posted @ 2019-03-25 08:59
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小结 1、根的置换:这些根所满足的任何代数方程,在置换之后也依然成立。 2、 x^3-2=0在Q上无解,域扩张field extension至R? 》求x在fieldA上f(x)=0的解,(注意,讨论解一定要指明讨论的域field) >放到扩张域fieldB上讨论因为是更大的域,所以,在小域上解与解
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posted @ 2019-03-22 23:29
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小结: 1、block diagonal matrix 直和 块对角矩阵 A block diagonal matrix is a block matrix that is a square matrix, and having main diagonal blocks square matrice
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posted @ 2019-03-21 16:43
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1、唯一键必须包含分区函数中的所有字段;主键是唯一键的一种; A PRIMARY KEY must include all columns in the table's partitioning function 22.6.1 Partitioning Keys, Primary Keys, and
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posted @ 2019-03-21 10:57
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# https://dev.mysql.com/doc/refman/5.6/en/partitioning-columns-range.html'''CREATE TABLE employees ( id INT NOT NULL, fname VARCHAR(30), lname VARCHAR(30), hired DATE NOT NULL DEFAULT '1...
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posted @ 2019-03-21 10:41
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https://dev.mysql.com/doc/refman/8.0/en/partitioning-subpartitions.html
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posted @ 2019-03-21 09:25
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https://en.wikipedia.org/wiki/Eisenstein%27s_criterion In mathematics, Eisenstein's criterion gives a sufficient condition for a polynomial with integ
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posted @ 2019-03-20 23:47
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posted @ 2019-03-20 20:49
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小结: 1) CREATE TABLE t_copy LIKE t; INSERT INTO t_copy SELECT * FROM t; DROP TABLE IF EXISTS t; CREATE TABLE t LIKE t_copy; INSERT INTO t SELECT * FROM
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posted @ 2019-03-20 15:15
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MySQL CPU 使用率高的原因和解决方法_产品性能_常见问题_云数据库 RDS 版-阿里云 https://help.aliyun.com/knowledge_detail/51587.html 常见原因 系统执行应用提交查询(包括数据修改操作)时需要大量的逻辑读(逻辑 IO,执行查询所需访问的
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posted @ 2019-03-20 10:37
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https://baike.baidu.com/item/不变量理论/9224903?fr=aladdininvariant theory 一组几何元素由 k个参数组成的向量 P1表示.若 T为某一变换,T∈G , G为某一变换群,这组几何元素经 T变换后,其参数组成的向量由 P1变为 P2(P1,
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posted @ 2019-03-20 08:49
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But only in the last decade have researchers begun to measure happiness across the life span and, in doing so, try to understand why older people tend
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posted @ 2019-03-19 22:39
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https://baike.baidu.com/item/格拉姆矩阵/16274086 https://en.wikipedia.org/wiki/Gramian_matrix https://en.wikipedia.org/wiki/Matrix_congruence https://en.wi
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posted @ 2019-03-19 17:07
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小结: 1、同余关系或简称同余是相容于某个代数运算的等价关系。 https://baike.baidu.com/item/同余关系 https://en.wikipedia.org/wiki/Congruence_relation https://en.wikipedia.org/wiki/Equi
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posted @ 2019-03-19 16:32
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https://baike.baidu.com/item/同态 假设M,M′是两个乘集,也就是说M和M′是两个各具有一个封闭的具有结合律的运算*与*‘的代数系统。σ是M射到M′的映射,并且任意两个元的乘积的像是这两个元的像的乘积,即对于M中任意两个元a、b,满足σ(a*b)=σ(a)*’σ(b);也
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posted @ 2019-03-19 16:28
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https://en.wikipedia.org/wiki/Congruence_relation In abstract algebra, a congruence relation (or simply congruence) is an equivalence relation on an a
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posted @ 2019-03-19 15:50
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1、透明 https://en.wikipedia.org/wiki/Equivalence_relation In mathematics, an equivalence relation is a binary relation that is reflexive, symmetric and
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posted @ 2019-03-19 15:24
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小结: 1、 销量 广告 微分方程 动态系统 市场份额 https://en.wikipedia.org/wiki/Sethi_model The Sethi model was developed by Suresh P. Sethi and describes the process of ho
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posted @ 2019-03-19 14:36
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小结: 1、非奇异的;非退化的:只有输入为0(可以泛化的概念)结果才为0 2、If A ∈ Mm,n(F) and m < n, then A isnecessarily singular. A s*n s<n 则A必然奇异的。 A linear transformation or matrix i
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posted @ 2019-03-19 10:40
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非齐次线性方程组 引出线性流形 陪集
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posted @ 2019-03-18 21:17
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小结: 1、数域、环、半环 :一般化、泛化 https://en.wikipedia.org/wiki/Matrix_multiplication In mathematics, matrix multiplication or matrix product is a binary operatio
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posted @ 2019-03-18 17:47
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0.2.2 Linear transformations. Let U be an n-dimensional vector space and let V be an m-dimensional vector space, both over the same field F; let BU be
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posted @ 2019-03-18 16:04
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小结: 1、两个有限维度的向量空间,在同一数域下,是同构的 等价于 它们维数相等。 Isomorphism 同构 0.1.8 Isomorphism. If U and V are vector spaces over the same scalar field F, and if f : U →
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posted @ 2019-03-18 14:46
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