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The choice and agreement problems of a random function

Or Meir, Avishay Tal
2018 Information Processing Letters  
In this note, we observe that in a variety of computational models, if f is a random function then with high probability its corresponding choice and agreement problem are not much easier than computing  ...  In order to study this question, Beimel et al [BBKW14] introduced the following related problems: • The choice problem: Given m distinct instances, choose one of them and solve it. • The agreement problem  ...  We would also like to thank anonymous referees for comments that improved the presentation of this work, and also for pointing out an error in a previous version.  ... 
doi:10.1016/j.ipl.2017.12.007 fatcat:rqr7nxmkprfkpestgol5up25se

Simultaneity is harder than agreement

Brian A. Coan, Cynthia Dwork
1991 Information and Computation  
Specifically, our bound holds for any randomized protocol which solves either the simultaneous agreement problem or the distributed tiring squad problem.  ...  Our results are proved for randomized protocols, for a benign failure model (crash faults), and for a weak adversary.  ...  We also thank Yoram Moses, Nancy Lynch, and the referees for their helpful comments on earlier versions of this paper and Larry Stockmeyer for a helpful conversation.  ... 
doi:10.1016/0890-5401(91)90067-c fatcat:hjyg5hso4nb65hnv55hwdhc7o4

Random Machines: A bagged-weighted support vector model with free kernel choice [article]

Anderson Ara, Mateus Maia, Samuel Macêdo, Francisco Louzada
2019 arXiv   pre-print
However, its performance depends directly from the choice of the kernel function and their hyperparameters.  ...  In this article, it is proposed a novel framework to deal with the kernel function selection called Random Machines. The results improved accuracy and reduced computational time.  ...  If any kernel function applied in h r (x) does not do better than a random choice, then ACC r is closer to 0.5 and the probability of select that kernel function is next to zero.  ... 
arXiv:1911.09411v1 fatcat:c6qkgsvzozawjmhssbsvgik2gq

Random Machines: A Bagged-Weighted Support Vector Model with Free Kernel Choice

Anderson Ara, Mateus Maia, Francisco Louzada, Samuel Macêdo
2021 Journal of Data Science  
In this paper, we proposed a novel framework to deal with the kernel function selection called Random Machines.  ...  Improvement of statistical learning models to increase efficiency in solving classification or regression problems is a goal pursued by the scientific community.  ...  If any kernel function applied in h r (x) does not do better than a random choice, then ACC r is closer to 0.5 and the probability of select that kernel function is next to zero.  ... 
doi:10.6339/21-jds1014 fatcat:osvs45hjp5c4zc6zlv5yprshxi

Sifting attacks in finite-size quantum key distribution

Corsin Pfister, Norbert Lütkenhaus, Stephanie Wehner, Patrick J Coles
2016 New Journal of Physics  
More precisely, we combine LCA sifting with a certain parameter estimation protocol, and we prove the finite-key security of this combination.  ...  We analyze these two previously unnoticed problems, present eavesdropping strategies that exploit them, and find that the two problems are independent.  ...  CP and SW are funded by Singapore's MOE Tier 3A Grant MOE2012-T3-1-009, and STW, Netherlands.  ... 
doi:10.1088/1367-2630/18/5/053001 fatcat:gbbze5eozzaava2pasrftnwmay

Random Machines Regression Approach: an ensemble support vector regression model with free kernel choice [article]

Anderson Ara, Mateus Maia, Samuel Macêdo, Francisco Louzada
2020 arXiv   pre-print
The results exhibited a good performance of Regression Random Machines through lower generalization error without needing to choose the best kernel function during tuning process.  ...  model to regression problems.  ...  Acknowledgements I would like to thank CAPES-CNPq, for financing this project and providing the necessary financial resources for the complete this research.  ... 
arXiv:2003.12643v1 fatcat:ofbc2udo6rak5ldruxg3wysymq

Distinct nodes visited by random walkers on scale-free networks [article]

Aanjaneya Kumar, M. S. Santhanam
2018 arXiv   pre-print
The problem of finding the distinct nodes visited by W walkers, effectively, can be reduced to that of a single walker.  ...  For a single random walker on complex networks, many properties such as the mean first passage time and cover time are known.  ...  ACKNOWLEDGMENTS The authors would like to acknowledge Yagyik Goswami for the initial contribution he made to this work.  ... 
arXiv:1501.01246v2 fatcat:tzisa7ejzfdxjdgyf7kt4tyhxu

Concurrency Effects Over Variable-size Identifiers in Distributed Collaborative Editing

Brice Nédelec, Pascal Molli, Achour Mostéfaoui, Emmanuel Desmontils
2013 ACM Symposium on Document Engineering  
CRDTs for sequences model a document as a set of elements (character, line, paragraph, etc.) with unique identifiers, providing two commutative update operations: insert and delete.  ...  The identifiers of elements can be either of fixed-size or variable-size. Recently, a strategy for assigning variable-size identifiers called LSEQ has been proposed for CRDTs for sequences.  ...  Indeed, instead of synchronizing the set of users, we provide an a priori agreement by the mean of a hash function.  ... 
dblp:conf/doceng/NedelecMMD13a fatcat:l534g56gdrb25icxq4kr36vhnu

Order-NGreen's Function Technique for Local Environment Effects in Alloys

I. A. Abrikosov, A. M. N. Niklasson, S. I. Simak, B. Johansson, A. V. Ruban, H. L. Skriver
1996 Physical Review Letters  
In Fig. 2 we present the total energy of ordered and random Cu 75 Zn 25 as a function of lattice spacing.  ...  The method is based on the Dyson equation for a cluster Green's function the dimension of which is reduced to a minimum due to a judicious choice of effective medium.  ... 
doi:10.1103/physrevlett.76.4203 pmid:10061227 fatcat:7llwvbii4fgnjjxgchjxya2liu

A unified framework for multi-agent agreement

Kiran Lakkaraju, Les Gasser
2007 Proceedings of the 6th international joint conference on Autonomous agents and multiagent systems - AAMAS '07  
We present such a unification, the Distributed Optimal Agreement Framework, and show how it captures a wide variety of agreement problems.  ...  Multi-Agent Agreement problems (MAP) -the ability of a population of agents to search out and converge on a common state -are central issues in many multi-agent settings, from distributed sensor networks  ...  DOA FRAMEWORK The Distributed Optimal Agreement framework comprises a specification of a problem and a specification of the dynamics of the agents in solving that problem.  ... 
doi:10.1145/1329125.1329151 dblp:conf/atal/LakkarajuG07 fatcat:cjn2nqqjbfaslcnnq3qlvj5zxa

Security Analysis of the PACE Key-Agreement Protocol [chapter]

Jens Bender, Marc Fischlin, Dennis Kügler
2009 Lecture Notes in Computer Science  
We show that the PACE protocol is secure in the real-or-random sense of Abdalla, Fouque and Pointcheval, under a number-theoretic assumption related to the Diffie-Hellman problem and assuming random oracles  ...  We analyze the Password Authenticated Connection Establishment (PACE) protocol for authenticated key agreement, recently proposed by the German Federal Office for Information Security (BSI) for the deployment  ...  We also thank the participants of the WG 16 sub group for the stimulating discussions, and Rainer Urian for feedback.  ... 
doi:10.1007/978-3-642-04474-8_3 fatcat:pyw5etkorbhp7phjrhivowm4ye

Page 42 of The Journal of Business Vol. 52, Issue 1 [page]

1979 The Journal of Business  
approach would be natural here except for the following problem: There is no agreement among workers in the area on a “‘correct’’ choice of the function T.  ...  The problem of finding the distribution of z, which is a known function of several random variables with a known distribution has been studied extensively as a part of distribution theory.*® And this standard  ... 

How Can Uncertainty Affect the Choice of Trade Agreements?

Elie Appelbaum, Mark Melatos
2016 The Economic Record  
This paper analyzes how uncertainty and the timing of its resolution influence the formation and design of regional trade agreements. Two sources of uncertainty -in demand and costs -are considered.  ...  Finally, we show that the timing of the resolution of uncertainty can significantly impact the type of trade agreement that countries wish to form.  ...  Stage 1: The Choice of Trade Agreement In stage 1, before the state of the world is known, countries 1 and 2 choose a TA.  ... 
doi:10.1111/1475-4932.12241 fatcat:ulak5wnppnctrfklxoscmvtbsq

Fast generators for the Diffie–Hellman key agreement protocol and malicious standards

Boaz Tsaban
2006 Information Processing Letters  
The Diffie-Hellman key agreement protocol is based on taking large powers of a generator of a prime-order cyclic group. Some generators allow faster exponentiation.  ...  On the other hand, we show that if there is some case in which fast generators are less secure, then this could be used by a malicious authority to generate a standard for the Diffie-Hellman key agreement  ...  We thank Steven Galbraith and Alfred Menezes for their useful comments.  ... 
doi:10.1016/j.ipl.2005.11.025 fatcat:p35atwh3bfhf3hvzyrx3j37tle

Generalized privacy amplification

C.H. Bennett, G. Brassard, C. Crepeau, U.M. Maurer
1995 IEEE Transactions on Information Theory  
The results have applications to unconditionally secure secret-key agreement protocols and quantum cryptography, and they yield results on wiretap and broadcast channels for a considerably strengthened  ...  This paper provides a general treatment of privacy amplification by public discussion, a concept introduced by Bennett, Brassard, and Robert for a special scenario.  ...  ACKNOWLEDGMENT The authors wish to thank C, Cachin, I. Damghd, M. Gander, J.-M. Robert, L. Salvail, M. Sfintha, and W.  ... 
doi:10.1109/18.476316 fatcat:wjbrqdvkyzbyvaxc6mc6vwfmua
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