BEGIN:VCALENDAR
PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20251007T171213Z
DTSTART:20251013T140000Z
DTEND:20251013T150000Z
SUMMARY:Manchester Geometry Seminar - Alexei Bolsinov
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}qza-mggthyb
 e-pysb2o
DESCRIPTION:Speaker: Alexei Bolsinov (Loughborough)\n\nTitle:  Nijenhuis 
 Geometry\n\nAbstract:\n\nA Nijenhuis structure on a smooth manifold is g
 iven by a field $L$ of endomorphisms with zero Nijenhuis torsion:\n$$\nL
 ^2[u\,v] - L[Lu\,v] - L[u\,Lv] + [Lu\, lv]=0.\n$$\nThe classical Haantje
 s theorem states that locally every Nijenhuis endomorphism with a simple
  real spectrum reduces\, in a suitable coordinate system\, to the diagon
 al form $L = diag ( f_1(u_1)\, \\dots f_n(u_n))$.   However\,  almost no
 thing is known about the global properties of Nijenhuis endomorphisms\, 
 nor about their behaviour at singular points where eigenvalues collide. 
 The talk will be devoted to our recent attempts to clarify these issues.
   I will try to provide an overview of the results in this area obtained
  over the past 5-7 years. The most of them will be fairly elementary and
  understandable to anyone familiar with the basics of differential geome
 try.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams Room 1\, Alan Turing Building\, Manchester
END:VEVENT
END:VCALENDAR