美 英 n.拉回;障碍;弱点 网络后别式 复数:pullbacks 英汉 英英 网络释义 n. 1. 拉回 2. 障碍 3. 弱点
a现实是残酷的 现实是残酷的[translate] a我怎么啊? 我怎么啊?[translate] ainternal factors 内部因素[translate] a用尽我的一切去爱你 Exhausts me all to love you[translate] anest alongside this species 巢沿着这个种类[translate] aPull-backs 拉扯支持[translate]...
pullbacks 释义 请查阅词条:pullback 随便看 drivel driven drive off drive on drive out driver drive something home (to somebody) drive-time drive up driveway driving drizzle drizzly DRM droll drone drone on drool droop droopy drop drop away drop back drop behind drop by 特使 特例 特供 特兀 ...
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...
但是在上一节提到的所有 topos 的例子中, 满态射的拉回真的是满态射, 书上说这件事会在第四章被解释清楚. 下面讨论终对象 (terminal object). 集合范畴中的终对象, 我们都知道, 就是单点集 {∗}. 预层范畴 SetCop 中的终对象是一个常值函子: ...
In these categories, pull-backs and push-outs do not generally exist. For example, no essential map between Eilenberg-MacLane spaces of different dimensions has a kernel. In this paper we define homotopy pull-backs and push-outs, which do exist and which behave like pull-backs and push-...
doi:http://dx.doi.org/Kristopher TappMathematicsK. Tapp, On pull-backs of the universal connection, preprint.
Homotopy Pushouts and Pullbacks We begin the chapter by discussing homotopy pushouts and homotopy pullbacks in the first two sections. These are analogues in the homotopy category of pushouts and pullbacks. They have many applications in homotopy theory and are necessa... MartinArkowitz,MartinAr...
An introduction to pull-backs of bundles and homotopy invariance, math.DG/0105161 - Morrison - 2000 () Citation Context ...(P), where f ∗ (P) denotes the ‘pull-back’ bundle, defined in [27, 2.5.3] or [29, §3.1]. A simple proof that this map is well defined, that is, ...
1) n-pullbacks n-拉回 2) n-pullback n拉回 3) n-pullbacks morphism n-拉回态射 1. This paper introducesn-pullbacks morphismin Abel category. 在Abel范畴C中,定义n-拉回态射,在此基础上建立n-拉回范畴C*,即C*是以范畴C中n-拉回为对象,n-拉回态射为态射。