CW复形(CW-Complex),也被称作胞腔复形,一直是代数拓扑最重要和最基本的一个几何结构,具有很多美妙的结果,但是看到知乎上的笔记大多不够全面和深入,所以我又来当活雷锋了233,不过建议读者阅读之前先掌握好同伦和同调的基本语言和技术,例如HEP,纤维列,MV列,相对同调等等。推荐的参考书有:J.P.May,Tom Dieck,...
G-CW complexCW complexequivariant complexIf G is a toral group, i.e. an extension of a torus by a finite group, and X is a G-CW complex we prove that there exists a G-homotopy equivalent CW complex Y with the property that the action map p: G x Y→Y is a, cellular map.M. ...
Ground-based observations of Io's extended sodium clouds provide a convenient means of studying the complex interaction of Jupiter's plasma torus with Io's atmosphere, and the accompanying atmospheric escape from Io. Interpretations of I... M Mendillo,JK Wilson,J Baumgardner,... - Bulletin of ...
Three-dimensional finite-volume-based numerical models of fluid, heat, and mass transport have been developed and applied to help explain the complex inter... BG Thomas,X Huang,RC Sussman - 《Metallurgical & Materials Transactions B》 被引量: 230发表: 1994年 Full toroidal continuously variable ...
Let Q q be a finite connected CW-complex of dimension q 2 whose fundamental group is Abelian. Denote by β 1 ( Q ) its first Betti number. We prove that if β 1 ( Q ) > q then π i ( Q ) is not finitely generated for some i = 2 , … , q. The same conclusion holds ...
Let Q~q be a finite connected CW-complex of dimension q ≥ 2 whose fundamental group is Abelian. Denote by β_1 (Q) its first Betti number. We prove that if β_1 (Q) > q then π_i (Q) is not finitely generated for some i =2,...,q. The same conclusion holds if X (Q)...