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(2019.11.14)Prof. Walter Bergweiler:Quasiconformal surgery and linear differential equations
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Update time: 2019-11-06
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Academy of Mathematics and Systems Science, CAS
Colloquia & Seminars

Speaker:

Prof. Walter Bergweiler,University of Kiel, Germany

Inviter:  
Title:
Quasiconformal surgery and linear differential equations
Time & Venue:
2019.11.14 16:00-17:00 N224
Abstract:

We consider the frequency of zeros of solutions of the differential equation w′′+Aw=0 with an entire coefficient A. First we review the results for a polynomial coefficient A. Next we discuss various results due to Bank, Laine and others dealing with the case that A is a transcendental entire function. We then describe a new method to construct coefficients A for which there are two linearly independent solutions with relatively few zeros. We start with certain coefficients A for which the solutions can be given explicitly and then sketch how solutions for different coefficients can be “glued” using quasiconformal maps. The method yields the solution of a problem posed by Bank and Laine. This is joint work with Alexandre Eremenko.

 

 

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