Книга Algorithms for Streaming Graphs Mariano Zelke

Algorithms for Streaming Graphs

Approaching Graph Problems with Limited Memory and without Random Access

Автор: Mariano Zelke
Език: Немски език
Корици: С меки корици
Наличност: Външен склад
Изпращаме след 8-11 дни
49.42 96.66 лв
An algorithm solving a graph problem is usually expected to have fast random access to the input gra...

Информация за книгата

Автор
Език
Немски език
Корици
Книга - С меки корици
Издадена
2009
страници
72
EAN
9783838108063
ISBN
383810806X
Enbook ID
07165368
Теглоt
109
Размери
152 x 229 x 5

Пълно описание

An algorithm solving a graph problem is usually expected to have fast random access to the input graph G and a working memory being able to store G completely. These powerful assumptions are put in question by massive graphs that exceed common working memories and that can only be stored on disks or even tapes. Here, random access is very time-consuming. To tackle massive graphs stored on external memories, the semi-streaming model has been proposed. It permits a working memory of restricted size and forbids random access to G. In contrast, the input is assumed to be a stream of edges in arbitrary order. In this book we develop algorithms in the semi-streaming model approaching different graph problems. For the problems of testing graph connectivity and bipartiteness and for the computation of a minimum spanning tree, we show how to obtain optimal running times. For the intractable problem of finding a maximum weighted matching, we present the best known approximation algorithm. Finally, we show the minimum and the maximum cut problem in a graph both to be intractable in the semi-streaming model and give algorithms that approximate respective solutions in a randomized fashion.

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