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NCTS Seminar on Mathematical Physiology
14:00 - 15:00, September 7, 2023 (Thursday)
Cisco Webex, Online seminar
(線上演講 Cisco Webex)
Traveling and Standing Fronts on Curved Surfaces
Bogdan Kazmierczak (Polish Academy of Sciences)


We analyze heteroclinic traveling waves propagating on two dimensional manifolds to show that the geometric modification of the front velocity is proportional to the geodesic curvature of the front line. As a result, on surfaces of concave domains, stable standing fronts can be formed on lines of constant geodesic curvature. These lines minimize the geometric functional describing the system's energy, consisting of terms proportional to the front line-length and to the enclosed surface area. Front stabilization at portions of surface with negative Gaussian curvature, provides a mechanism of pattern formation. In contrast to the mechanism associated with the Turing instability, the proposed mechanism requires only a single scalar bistable reaction–diffusion equation and connects the intrinsic surface geometry with the arising pattern. By considering a system of equations modeling boundary-volume interactions, we show that polarization of the boundary may induce a corresponding polarization in the volume.

Zoom Link: https://ntucc.webex.com/ntucc-en/j.php?MTID=m5fa2a39a3de65ba2875571220732dfa2

Meeting number (access code): 2511 761 9832
Meeting password: bfSF3zmAB87



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