Download e-book for iPad: Approximation Algorithms for NP-Hard Problems by Dorit Hochbaum

By Dorit Hochbaum

ISBN-10: 0534949681

ISBN-13: 9780534949686

Approximation set of rules for scheduling / Leslie A. corridor -- Approximation algorithms for bin packing : a survey / E.G. Coffmann, Jr., M.R. Garey, and D.S. Johnson -- Approximating masking and packing difficulties : set disguise, vertex hide, self sufficient set, and comparable difficulties / Dorit S. Hochbaum -- The primal-dual procedure for approximation algorithms and its software to community layout difficulties / Michel X. Goemans and David P. Williamson -- reduce difficulties and their program to divide-and-conquer / David B. Shmoys -- Approximation algorithms for locating hugely attached subgraphs / Samir Khuller -- Algorithms for locating low measure buildings / rainbowbalaji Raghavachari -- Approximation algorithms for geometric difficulties / Marshall Bern and David Eppstein -- a number of notions of approximations : strong, greater, most sensible, and extra / Dorit S. Hochbaum -- Hardness of approximations / Sanjeev Arora and Carsten Lund -- Randomized approximation algorithms in combinatorial optimization / Rajeev Motwani, Joseph (Seffi) Naor, and Prabhakar Raghavan -- The Markov chain Monte Carlo strategy : an method of approximate counting and integration / Mark Jerrum and Alistair Sinclair -- on-line computation / Sandy Irani and Anna R. Karlin

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Extra info for Approximation Algorithms for NP-Hard Problems

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1000 X 1000, but at the same time they are sparse: say only 1000 out of one million possible elements are nonzero. On most computers today it would be impossible to store a full 1000 X 1000 matrix in the memory at once. Therefore, we ask for an alternative representation for sparse matrices. The alternative representation will explicitly store only the nonzero elements. Each element of a matrix is uniquely characterized by its row and column position, say i,j. We might then store a matrix as a list of 3-tuples of the form (i,j,value).

1, define the structure Boolean with operations AND, OR, NOT, IMP and EQV (equivalent) using only the if-then-else statement. g. NOT (X) :: = if X then false else true. EXERCISES 31 32 CHAPTER 2: ARRAYS 20. Give a version of a binary search procedure which initializes lower to zero and upper to n + l. 21. Take any version of binary search, express it using assignment, if-then-else and go to and then give an equivalent recursive program. 22. 3. 23. 3 where . Analyze the time and space requirements of your algorithm.

Before we write a matrix multiplication procedure, it will be useful to define a sub-procedure: procedure STORESUM (C,q,row,col,sum) //if sum is nonzero then along with its row and column position it is stored into the q-th entry of the matrix// if sum 0 then [(C(q,1),C(q,2),C(q,3) (row,col,sum) q q + 1; sum 0] end STORESUM The algorithm MMULT which multiplies the matrices A and B to obtain the product matrix C uses the strategy outlined above. It makes use of variables i,j,q,r,col and row__begin.

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Approximation Algorithms for NP-Hard Problems by Dorit Hochbaum

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