还有个很有趣的角度:pullback其实是个丛就能定义,pushforward要特别的多,需要一些特殊的结构做基础(比如切丛) 03-07· 上海 回复4 巨鶸RD 作者 还真是 03-07· 美国 回复1 rubberball 皮球 想问的是这里的pullback和pushforward和范畴里那个拉回推出有什么关系,这个是不是也能写出类似的泛性...
In this chapter we introduce two extremely important concepts, the push-forward of a vector and the pull-back of a differential form. In section one we take a close look at a simple change of coordinates and see what affect this change of coordinates has on the volume of the unit square...
你后面讲的是拉格朗日描述法和欧拉描述法吧，这两种描述法实际上是定义了两种坐标系统，同一个张量在这个两种坐标系统中肯定是不一样的。在连续介质力学中应力张量、应变张量都有几种不同的定义方式，各种定义方式是不同的张量，不要理解错了。
以下来自章璞<基础代数学讲义>拉回(Pullback) & 推出(pushout) 定义1. 给定范畴\mathcal{C}中两个态射f:B\rightarrow A与g:C\rightarrow A,拉回是一个三元组 (D,\alpha,\beta) ,其中\alpha:D\rightarrow…
We introduce the notion of smooth homotopies, and prove the converse of Poincaré's Lemma in the case of forms defined on a smoothly contractible region in R n R n mathContainer Loading Mathjax . 展开 关键词:Differential form Tangent vector Push-forward Pull-back Poincaré’s Lemma ...
a在我之后,通过小组的其他成员介绍竞争优势。 After me, introduces the competitive advantage through group's other members.[translate] a华丽美眉 Magnificent beautiful eyebrow[translate] apull back then push forward to bow 拉扯那时抓紧进行对弓[translate]...
[translate] aChery Fulwin 2 Chery fulwin 2 [translate] a英语使我快乐 English causes me to be joyful [translate] a你该笑得甜美 You should smile delightfully [translate] apull back then push forward to bowl 拉扯那时抓紧进行滚保龄球 [translate] ...
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Related to Pushforward:pullback ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Verb1. push forward- push one's way; "she barged into the meeting room" barge,thrust ahead belt along,bucket along,cannonball along,hie,hotfoot,pelt along,rush,rush along,speed,step on it,hasten...