[Turkmath:6975] April 16 (Friday), 2010 - 14:00, Szilard Szabo (Budapest University of Technology and Economics), The minimal number and algebraic construction of apparent singularities of logarithmic connections
Kursat Aker
aker at gursey.gov.tr
15 Nis 2010 Per 13:05:13 EEST
TUBITAK <http://www.tubitak.gov.tr>Feza Gursey Institute
<http://www.gursey.gov.tr/>BOUN <http://www.boun.edu.tr>
April 16 (Friday), 2010 - 14:00
*Szilard Szabo* (Budapest University of Technology and Economics)
*The minimal number and algebraic construction of apparent singularities
of logarithmic connections*
*Abstract :* It is classical to associate a linear first-order system of
differential equations to a higher-order scalar valued linear equation
over a complex domain. Conversely, one may ask whether any system over
the Riemann sphere can be represented in a suitable sense by a
higher-order equation. The answer to this question is known to be
affirmative, at least over the complement of a finite subset, whose
points are called apparent singularities. In this talk, we will
determine the minimal cardinality of this subset, and give an algebraic
method to find a representative with this number of apparent
singularities. This induces rational maps from the moduli space of
logarithmic connections to projective space. We also spell out the
choices on which are construction depends, and raise a few open questions.
Poster <http://www.gursey.gov.tr/autoposter/posters/47.pdf>
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