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- W1553695993 abstract "The field of stochastic growth encompasses various different processes whichare ubiquitously seen across the physical world. In many systems, stochasticityappears quite naturally, where inherent randomness provides the right setting for thetone of motion and interaction, whose symphony leads to the surprising emergenceof interesting patterns and structure. Although on the microscopic scale one can beoverwhelmed by the randomness arising from the fluctuating interactions betweencomponents, on the macroscopic scale, however, one is mesmerized by the emergenceof mathematical beauty and symmetry, leading to complex structures with fractalarchitecture.Competition between components adds an extra degree of complexity andleads to the possibility of critical behaviour and phase transitions. It is an importantaspect of many systems, and in order to provide a full explanation of many naturalphenomena, we have to understand the role it plays on modifying behaviour. Thecombination of stochastic growth and competition leads to the emergence of interestingcomplex patterns. They occur in various systems and in many forms, andthus we treat competition in growth models driven by different laws for the stochasticnoise. As a consequence our results are widely applicable and we encourage thereader to find good use for them in their respective field.In this thesis we study stochastic systems containing interacting particleswhose motion and interplay lead to directed growth structures on a particular geometry.We show how the effect of the overall geometry in many growth processescan be captured elegantly in terms of a time dependent metric. A natural examplewe treat is isoradial growth in two dimensions, with domain boundaries of competingmicrobial species as an example of a system with a homogeneously changingmetric. In general, we view domain boundaries as space-time trajectories of particlesmoving on a dynamic surface and map those into more easily tractable systemswith constant metric. This leads to establishing a generic relation between locallyinteracting, scale invariant stochastic space-time trajectories under constant andtime dependent metric. Indeed “the book of nature is written in the language ofmathematics” (Galileo Galilei) and we provide a mathematical framework for varioussystems with various interactions and our results are backed with numericalconfirmation." @default.
- W1553695993 created "2016-06-24" @default.
- W1553695993 creator A5045995727 @default.
- W1553695993 date "2012-09-01" @default.
- W1553695993 modified "2023-09-27" @default.
- W1553695993 title "Stochastic pattern formation in growth models with spatial competition" @default.
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