Extended formulations, nonnegative factorizations, and randomized communication protocols
Extended formulations, nonnegative factorizations, and randomized communication protocols
复制标题
扩展公式、非负分解和随机通信协议
DOI:
10.1007/s10107-014-0755-3
复制
发表时间:
2015
影响因子:
2.7
通讯作者:
H.R. Tiwary
中科院分区:
文献类型:
--
作者:
Y. Faenza;S. Fiorini;R. Grappe;H.R. Tiwary
An extended formulation of a polyhedronis a linear description of a polyhedrontogether with a linear mapsuch that. These objects are of fundamental importance in polyhedral combinatorics and optimization theory, and the subject of a number of studies. Yannakakis’ factorization theorem (Yannakakis in J Comput Syst Sci 43(3):441–466, 1991) provides a surprising connection between extended formulations and communication complexity, showing that the smallest size of an extended formulation ofequals the nonnegative rank of its slack matrix. Moreover, Yannakakis also shows that the nonnegative rank ofis at most, whereis the complexity of anydeterministicprotocol computing. In this paper, we show that the latter result can be strengthened when we allow protocols to berandomized. In particular, we prove that the base-logarithm of the nonnegative rank of any nonnegative matrix equals the minimum complexity of a randomized communication protocol computing the matrix in expectation. Using Yannakakis’ factorization theorem, this implies that the base-logarithm of the smallest size of an extended formulation of a polytopeequals the minimum complexity of a randomized communication protocol computing the slack matrix ofin expectation. We show that allowing randomization in the protocol can be crucial for obtaining small extended formulations. Specifically, we prove that for the spanning tree and perfect matching polytopes, small variance in the protocol forces large size in the extended formulation.
登录
查看更多内容
DOI:
10.1007/978-0-387-30162-4_28
发表时间:
2021-08
期刊:
Proceedings of the 1997 International Symposium on Parallel Architectures, Algorithms and Networks (I-SPAN'97)
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1109/sct.1991.160275
发表时间:
1991
期刊:
[1991] Proceedings of the Sixth Annual Structure in Complexity Theory Conference
影响因子:
--
作者:
Matthias Krause
通讯作者:
Matthias Krause
DOI:
--
发表时间:
2009
期刊:
Conference on Integer Programming and Combinatorial Optimization
影响因子:
--
作者:
V. Kaibel;Kanstantsin Pashkovich;D. Theis
通讯作者:
D. Theis
DOI:
--
发表时间:
2012
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
--
作者:
Yuri Faenza;G. Oriolo;Gautier Stauffer
通讯作者:
Gautier Stauffer
DOI:
10.1006/jctb.2000.2013
发表时间:
2001
期刊:
J. Comb. Theory B
影响因子:
--
作者:
A. Thomason
通讯作者:
A. Thomason