Titlebook: Combinatorial Algebraic Topology; Dmitry Kozlov Textbook 20081st edition Springer-Verlag Berlin Heidelberg 2008 Algebraic topology.Charact

沙漠

Obstruction

TERRA

Homotopy ColimitsWe start directly by defining the main character of this chapter.

瑣事

craving

灌輸

Principal Γ-Bundles and Stiefel—Whitney Characteristic Classestried to assemble a number of relevant results to entice the reader to consult the standard texts. Most of the given proofs are sketchy, though the proofs of the statements that are needed for later applications are complete.

indubitable

GEON

Acyclic Categorieshe more general framework of .. As we shall see in subsequent chapters, no additional difficulties will arise, so there is virtually no penalty to pay for this generality. On the contrary, the situation gets clarified and even simplified in some cases, for example, in dealing with quotients of complexes equipped with group actions in Chapter 14.

Assault

Evasiveness and Closure Operators of vertices is a prime power. In this chapter we describe the framework of the problem, sketch the original argument, and prove some important facts about nonevasiveness. One of the important tools is the so-called closure operators, which are also useful in other contexts.

冷峻