We explore patterns of trophic connections between species in the largest and highest-quality empirical food webs to date, introducing a new topological prop- erty called the degree distribution, defined as the frequency of species SL with L links. Non-trivial differences are shown in degree...

A simple model of tag-mediated partner selection for agents playing the IPD is described. The agents strategies are represented as (i,q,q) triples as in [Nowak and May, 1992]. The tags are represented as arbitrary real numbers in [0,1], and tag selection is biased toward agents with similar...

Using mostly elementary considerations, we find out who wins the game of Domineering on all rectangular boards of width 2, 3, 5, and 7. We obtain bounds on other boards as well, and prove the existence of polynomial-time strategies for playing on all boards of width 2, 3, 4, 5, 7, 9, and 11. We...

Computer codes for computation and comparison of RNA secondary structures, the {\tt Vienna RNA package}, are presented, that are based on dynamic programming algorithms and aim at predictions of structures with minimum free energies as well as at computations of the equilibrium partition...

We study the small-world network model, which mimics the transition between regular-lattice and random-lattice behavior in social networks of increasing size. We contend that the model displays a normal continuous phase transition with a divergent correlation length as the degree of randomness...

Many of the applications of game theory have been to economics where the individuals under study are assumed to be maximizing profits or Òutility'' or some other conventional economic goal of Òstatus.'' Loosely stated we think of status as one's position in a society compared with others,...

Individual behavioral strategies that use conditional probabiltites for future environments and information about past environments are studied. The environments are random and Markovian. The individual uses the information available to it to prepare for the next environmental state in order to...

We have calculated the base pair probability distribution for the secondary structure of a full length HIV-1 genome using the partition function approach introduced by MasCaskill (1990). By analyzing the full distribution of base pair probabilities instead of a restricted number of secondary...

We use symbolic regression (implemented by a genetic program) to analyze the role of agent expectation formation in games. In the model, agents attempt to infer the strategies of opponents through regression and then best respond using this information. Though agents use deterministic...