小天使
发表于 2025-3-21 16:11:27
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终止
发表于 2025-3-21 22:50:03
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勤勉
发表于 2025-3-22 03:17:43
https://doi.org/10.1057/9780230509726methods used in a very large area of mathematics; we can only achieve this (without exceeding the limits of this book) by omitting the details of programming techniques. Readers interested in concrete programs are referred to Syslo, Deo and Kowalik (1983) and Nijenhuis and Wilf (1978), where program
compose
发表于 2025-3-22 04:41:28
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天文台
发表于 2025-3-22 10:41:56
https://doi.org/10.1057/9780230509726 is easy to verify for any given graph. But how can we find an Euler tour in an Eulerian graph? The proof of Theorem 1.3.1 only shows that such a tour exists, but does not tell us how to find it (though it contains a hint of how to achieve this). We are looking for a method for constructing an Euler
课程
发表于 2025-3-22 13:15:48
Zhaoyuan Tian,Shuxian Ye,Hang Qiangerman motorways in the official guide ‘Autobahn Service’, the railroad or bus lines in some system of public transportation, or the network of routes an airline offers are represented as graphs without anybody being aware of it. Thus, it is obviously of great practical interest to study paths in su
课程
发表于 2025-3-22 17:28:44
https://doi.org/10.1007/978-1-4039-1402-6etermining the number of trees on . vertices and, more generally, the number of spanning trees in a connected graph. The main part of this chapter is devoted to problems of the following kind: In some given network, we look for a spanning tree for which the sum of all lengths of edges is minimal. Th
一大块
发表于 2025-3-23 00:33:53
https://doi.org/10.1007/978-3-8350-9108-5on ‘independence systems’ (as, for example, in the case of the Algorithm of Kruskal, the system of spanning forests of a graph). However, the strategy used is rather short-sighted: we always choose the element which seems best at the moment (that is, of all the admissible elements, we choose the ele
闷热
发表于 2025-3-23 03:08:18
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AVANT
发表于 2025-3-23 06:27:28
https://doi.org/10.1057/9781137010452rsal Theory can be developed from the theory of flows on networks; this approach was first suggested in the book by Ford and Fulkerson (1962) and is also used in the survey by Jungnickel (1986). Compared with the usual approach of taking the Marriage Theorem of Hall (1935) — which we treat in Sectio