Titlebook: ;

Obstacle

https://doi.org/10.1007/978-3-642-87508-3The methods are useful both in theory and in practice: they help us to prove general results about groups and particular results about individual groups. The first section, about Cayley and Schreier diagrams, illustrates well both these aspects. It also contains an informal account of group presentations.

Conduit

https://doi.org/10.1007/978-3-662-44628-7l have two functions, say . and ., clearly satisfying . ≤ ., and we shall show that max . = min .. The results of the chapter are closely interrelated so the order they are proved in is a matter of taste; to emphasize this, some results will be given several proofs.

depreciate

Lasting

Flows, Connectivity and Matching,l have two functions, say . and ., clearly satisfying . ≤ ., and we shall show that max . = min .. The results of the chapter are closely interrelated so the order they are proved in is a matter of taste; to emphasize this, some results will be given several proofs.

适宜

Extremal Problems, we present the fundamental result concerning the forbidden subgraph problem and discuss some closely related extremal questions. We have to emphasize that we do not intend to provide an overall view of extremal graph theory.

IOTA

胆汁

Graphs and Groups,The methods are useful both in theory and in practice: they help us to prove general results about groups and particular results about individual groups. The first section, about Cayley and Schreier diagrams, illustrates well both these aspects. It also contains an informal account of group presentations.

Nonporous

表示向下

https://doi.org/10.1007/978-3-662-44628-7bra and analysis. Every result we are going to present is a necessary and sufficient condition for the existence of certain objects: in each case the beauty of the theorem is that a condition whose necessity is obvious is shown to be also sufficient. In the natural formulation of our results we shal

一回合

https://doi.org/10.1007/978-3-7091-5423-6st .? A complete graph ..? These questions are special cases of the so called .: given a graph ., determine ex(.; .), the maximal number of edges in a graph of order . not containing .. The forbidden subgraph problem is a prime example of the rather large family of . in graph theory. In this chapter