安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- intuition - What is the affine space and what is it for? - Mathematics . . .
It may be more fruitful to compare groups of transformations Speaking of groups acting on a Cartesian space, with the analogous questions in parentheses: orthogonal transformations ("What is an inner product space?"), linear transformations ("What is a vector space?"), affine transformations ("What is an affine space?")
- 仿射函数、线性函数的区别？ - 知乎
严格意义上讲区别只在于有没有截距。 首先如果你谷歌一下，谷歌就会告诉你仿射函数就是线性函数加平移。其实从名字上就可以看出来区别在于一个是线性映射，一个是仿射映射。 在学校里（尤其是中学）经常使用包含截距的ax+b（一阶多项式）表示线性函数，但是，从严格的数学意义上讲，它是
- What are differences between affine space and vector space?
An Affine space abstracts the affine combinations You can think of an affine combination as a weighted average, or a convex hull (if you limit the coefficients to be between 0 and 1)
- 仿射函数这名字好深奥，但概念其实非常简单，为什么要取这个名字？ - 知乎
我整理一下我查到的资料： “仿射”这个词，翻译自英语affine，为什么会翻译出这两个字，我没查到。 英语affine，来自于英语affinity。英语词根fin来自于拉丁语finis，表示“边界，末端”，例如finish、final等单词。词头ad表示“去，往”，拼出名词affinity，本意为“接壤，结合”，用来指“姻亲，由于
- Closed subset of an affine variety. . . is it affine?
My naive understanding of this affine not affine business is that for an affine variety we can write down something like a global coordinate system (the coordinate ring), while for a general algebraic variety we have just local coordinates, ie we have many affines patched together in a way that cannot be described globally with the usual tools
- 请问仿射集 (affine set)和仿射包（affine hull）有什么区别？ - 知乎
仿射集 (Affine Set)和仿射包 (Affine hull)是凸优化中常见的两个概念。 仿射集 仿射包 仿射集 对于集合 C ⊆ R n C \subseteq R^ {n} ，如果通过集合 C C 中任意两个点的 直线 仍在集合 C C 中, 那么称 C C 是仿射集, 换言之, ∀ x ∈ C, y ∈ C, θ ∈ R \forall x\in C, y \in C, \theta \in R
- convex analysis - Are affineness and convexity equivalent . . .
In reading about convex optimization, the author states that all convex sets are affine Are affineness and convexity equivalent? If I understand, both definitions incorporate the notion that a s
- Inverse of transformation matrix - Mathematics Stack Exchange
Note that M is a composite matrix built from fundamental geometric affine transformations only Show the initial transformation sequence of M, invert it, and write down the final inverted matrix of M
|
|
|