The problem of finding the folding pathway of a polymer, a fundamental issue in the field of molecular biophysics, is viewed from a geometrical standpoint. A riemannian metric on conformation space related to hydrodynamical features of the system and a drift related to the potential are used to derive a diffusion equation governing the time dependent probability in conformation space. The thermodynamic equilibrium limit is found to be consistent with Boltzmann's measure.
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