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Seminar on Complex Analysis (Gonchar Seminar)
September 28, 2015 18:00, Moscow, Steklov Mathematical Institute, Room 411 (8 Gubkina)
 


Polynomial lemniscates and their fingerprints: from geometry to topology

A. Yu. Vasiliev

University of Bergen

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Abstract: Our main objects of study are shapes given by polynomial lemniscates, and their fingerprints. After giving some simple relations between analytic properties of shapes and fingerprints, we focus on the inflection points of fingerprints, their number and geometric meaning. Furthermore, we study dynamics of zeros of lemniscate-generic polynomials and their “explosion” that occur by planting singularities at certain moment, and then performing their versal deformation by a braid group. We call this dynamics polynomial fireworks and and show that it is realized by construction of a braid operad.
Joint work with Dmitry Khavinson (University of South Florida, USA).

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