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<p><a href="page.php?w=topography">topography</a>.</p>

<p><big>Mathematics</big></p>
<p>Physical models of phyllotaxis date back to <a href="page.php?w=George_Biddell_Airy_">Airy</a>'s experiment of packing hard spheres. <a href="page.php?w=Gerrit_van_Iterson">Gerrit van Iterson</a> diagrammed grids imagined on a cylinder (rhombic lattices). Douady et al. showed that phyllotactic patterns emerge as self-organizing processes in dynamic systems. In 1991, Levitov proposed that lowest energy configurations of repulsive particles in cylindrical geometries reproduce</p><p>
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