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Fokkink, R.J. (author), de Munnik, J.C. (author)We extend the notion of boycotts between players in cooperative games to boycotts between coalitions. We prove that convex games offer a proper setting for studying these games. Boycotts have a heterogeneous effect. Individual players that are targeted by manyonone boycotts suffer most, while nonparticipating players may actually benefit...journal article 2024
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Fokkink, R.J. (author), Meester, L.E. (author), Pelekis, Christos (author)We want to find the convex combination S of iid Bernoulli random variables that maximizes P(S ≥ t) for a given threshold t. Endre Csóka conjectured that such an S is an average if t ≥ p, where p is the success probability of the Bernoulli random variables. We prove this conjecture for a range of p and tjournal article 2023
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Brethouwer, J.F. (author), Fokkink, R.J. (author), Greene, Kevin T. (author), Lindelauf, R.H.A. (author), Tornquist, Caroline (author), Subrahmanian, VS (author)The ChinaIndia border is the longest disputed border in the world. The countries went to war in 1962 and there have been recurring border skirmishes ever since. Reports of Chinese incursions into Indian territory are now a frequent occurrence. This rising tension between the world’s most populous countries not only poses risks for global...journal article 2022
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Fokkink, R.J. (author)Wythoff Nim is a classical combinatorial game of queen moves on a chessboard. There are many ways to describe its Ppositions (safe positions to move to). One way is to code them by the Fibonacci word 010010100100101.., which is the unique fixed point of the substitution of 0 by 01, and of 1 by 0. The coordinates of the nth Pposition are...journal article 2022
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Fokkink, R.J. (author), Papavassiliou, Symeon (author), Pelekis, Christos (author)Let S and X be independent random variables, assuming values in the set of nonnegative integers, and suppose further that both E(S) and E(X) are integers satisfying E(S) ≥ E(X). We establish a sufficient condition for the tail probability P(S ≥ E(S)) to be larger than the tail P(S + X ≥ E(S + X)), when the mean of S is equal to the mode.journal article 2022
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Brethouwer, J.F. (author), van de Rijt, Arnout (author), Lindelauf, Roy (author), Fokkink, R.J. (author)This paper repurposes the classic insight from network theory that longdistance connections drive disease propagation into a strategy for controlling a second wave of Covid19. We simulate a scenario in which a lockdown is first imposed on a population and then partly lifted while longrange transmission is kept at a minimum. Simulated...journal article 2021
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Greene, Kevin T. (author), Tornquist, Caroline (author), Fokkink, R.J. (author), Lindelauf, Roy (author), Subrahmanian, V.S. (author)Since the 1960s China and India have engaged in a dispute about the demarcation of their shared border. This territorial dispute led to a brief war in 1962, and recurring flareups over the following decades, including during the summer of 2020. The potential for further escalation of this dispute poses significant risks to Indian and Chinese...journal article 2021
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Fokkink, R.J. (author), Kikuta, Ken (author), Ramsey, David (author)We study search games in which the hider may hide in a finite number of locations. We assume that the cost of searching these locations does not depend on the order in which the locations are searched. From these assumptions we derive that the cost function is submodular, thus placing search games with an immobile hider in the context of...journal article 2017
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De Jong, Jenny (author), Fokkink, R.J. (author), Olsder, G.J. (author), Schwab, A.L. (author)In a cycling time trial, the rider needs to distribute his power output optimally to minimize the time between start and finish. Mathematically, this is an optimal control problem. Even for a straight and flat course, its solution is nontrivial and<br/>involves a singular control, which corresponds to a power that is slightly above the aerobic...journal article 2017
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de Jong, J. (author), Fokkink, R.J. (author), Olsder, G.J. (author), Schwab, A.L. (author)The optimal pacing strategy of a cyclist in an individual timetrial depends on terrain, weather conditions and the cyclists endurance capacity. Previous experimental and theoretical studies have shown that a suboptimal pacing strategy may have a substantial negative effect. In this paper we express the optimal pacing problem as a...conference paper 2016
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Alpern, S. (author), Fokkink, R.J. (author), Kikuta, K. (author)In an accumulation game, the Hider secretly distributes his given total wealth $h$ among $n$ locations, while the Searcher picks $r$ locations and confiscates the material placed there. The Hider wins if what is left at the remaining $nr$ locations is at least 1; otherwise the Searcher wins. Ruckle's conjecture says that an optimal Hider...journal article 2010
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 Fokkink, R.J. (author), Graaf, F. de (author) report 1998
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 Fokkink, R.J. (author), Los, F.J. (author) report 1998
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 Fokkink, R.J. (author) report 1998
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 Fokkink, R.J. (author) report 1998
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 Fokkink, R.J. (author) report 1998
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 Fokkink, R.J. (author) report 1997
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 Wang, Z.B. (author), Thoolen, P.M.C. (author), Fokkink, R.J. (author) report 1997
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 Fokkink, R.J. (author), Wang, Zhengbing (author), Schropp, M.H.I. (author) conference paper 1995
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 Wang, Z.B. (author), Fokkink, R.J. (author), Karssen, B. (author) report 1993
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