ar X iv : a da p - or g / 99 05 00 2 v 1 4 M ay 1 99 9 Model of self - replicating cell capable of self - maintenance

ar X iv : a da p - or g / 96 05 00 1 v 1 1 4 M ay 1 99 6 Propagation of Information in Populations of Self - Replicating Code

We observe the propagation of information in a system of self-replicating strings of code (“Artificial Life”) as a function of fitness and mutation rate. Comparison with theoretical predictions based on the reaction-diffusion equation shows that the response of the artificial system to fluctuations (e.g. velocity of the information wave as a function of relative fitness) closely follows that of...

ar X iv : h ep - p h / 99 05 24 9 v 2 1 2 M ay 1 99 9 BI - TP 99 / 12 Two - loop self - energy master integrals on shell

Analytic results for the complete set of two-loop self-energy master integrals on shell with one mass are calculated.

ar X iv : m at h / 99 05 00 1 v 1 [ m at h . A G ] 1 M ay 1 99 9 Tacnodes and cusps

ar X iv : h ep - p h / 99 05 24 9 v 1 5 M ay 1 99 9 BI - TP 99 / 12 Two - loop self - energy master integrals on shell

Analytic results for the complete set of two-loop self-energy master integrals on shell with one mass are calculated.

ar X iv : a da p - or g / 99 11 00 4 v 1 1 9 N ov 1 99 9 Criticality and Punctuated Equilibrium in a Spin System Model of a Financial Market

We describe a financial market model which shows a non-equilibrium phase transition. Near the transition punctuated equilibrium behaviour is seen, with avalanches occuring on all scales. This scaling is described by an exponent very near 1. This system shows intermittent time development with bursts of global synchronization reminiscent of a market rollercoaster.