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单词 Matrix product
释义

Matrix product

原声例句
Linear algebra

I really do encourage you to play around more with this idea, imagining two different transformations, thinking about what happens when you apply one after the other, then working out the matrix product numerically.

我真的鼓励你们多尝试一下这个想法 想象两个不同的变换 想想当你一个接一个地应用时会发生什么 然后用数字计算出矩阵乘积。

Linear algebra

That middle matrix represents a transformation of some kind as you see it, and the outer two matrices represent the empathy, the shift in perspective, and the full matrix product represents that same transformation, but as someone else sees it.

中间的矩阵代表了你看到的某种变换 外面的两个矩阵代表了移情 视角的转变 整个矩阵乘积代表了同样的变换 但是是其他人看到的。

中文百科

矩阵乘法 Matrix multiplication

(重定向自Matrix product)

这篇文章给出多种矩阵相乘方法的综述。

矩阵相乘最重要的方法是一般矩阵乘积。它只有在第一个矩阵的栏数(column)和第二个矩阵的列数(row)相同时才有定义。一般单指矩阵乘积时,指的便是一般矩阵乘积。若Am\times n矩阵,Bn\times p矩阵,则他们的乘积AB(有时记做A · B)会是一个m\times p矩阵。其乘积矩阵的元素如下面式子得出:

以上是用矩阵单元的代数系统来说明这类乘法的抽象性质。本节以下各种运算法都是这个公式的不同角度理解,运算结果相等:

左边的图表示出要如何计算AB的(1,2)和(3,3)元素,当A是个4×2矩阵和B是个2×3矩阵时。分别来自两个矩阵的元素都依箭头方向而两两配对,把每一对中的两个元素相乘,再把这些乘积加总起来,最后得到的值即为箭头相交位置的值。

英语百科

Matrix multiplication 矩阵乘法

(重定向自Matrix product)
Arithmetic process of multiplying numbers (solid lines) in row i in matrix A and column j in matrix B, then adding the terms (dashed lines) to obtain entry ij in the final matrix.
The bound on ω over time.
Block matrix multiplication. In the 2D algorithm, each processor is responsible for one submatrix of C. In the 3D algorithm, every pair of submatrices from A and B that is multiplied is assigned to one processor.

In mathematics, matrix multiplication is a binary operation that takes a pair of matrices, and produces another matrix. Numbers such as the real or complex numbers can be multiplied according to elementary arithmetic. On the other hand, matrices are arrays of numbers, so there is no unique way to define "the" multiplication of matrices. As such, in general the term "matrix multiplication" refers to a number of different ways to multiply matrices. The key features of any matrix multiplication include: the number of rows and columns the original matrices have (called the "size", "order" or "dimension"), and specifying how the entries of the matrices generate the new matrix.

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更新时间:2025/6/18 6:39:20