Abstract
Once upon a time, biologists were accused of physics envy, of wanting universal laws and neat equations. The opposite could now be true, with physicists and mathematicians looking to biology for challenging problems and complex systems. Their contribution is often to recognize that a biological system resembles a mathematical framework for which a set of solutions already exists: the same equations have the same solutions, irrespective of their origin. This approach is illustrated by a recent model developed by Aurell and Sneppen [1] that frames the transition between lytic and lysogenic phases of bacteriophage replication as a first exit problem, which is a way of characterizing the expected time at which a random process will end.
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