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SUMMARY:Liquid crystal defects\, a critical overview - Kleman\, M (Institu
 t de Physique du Globe de Paris)
DTSTART:20130624T084500Z
DTEND:20130624T093000Z
UID:TALK45862@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Defects in liquid crystals present an extremely vast set of si
 tuations\, depending on the nature of the order parameter\, elasticity pro
 perties\, boundary conditions. One distinguishes : defects characteristic 
 of liquid crystalline media with one or two discrete repeat distances (sme
 ctic and columnar phases) which can be investigated by pure geometric meth
 ods \; defects characteristic of a director order parameter\, which employ
  the Volterra process (for one dimensional defects) and topological method
 s\, those latter providing scope for defects of various dimensionalities \
 ; finally continuous defects whose consideration is essential for a descri
 ption of defect physical properties. These topics will be confronted with 
 an historical point of view and possible future developments.\n\n
LOCATION:Centre for Mathematical Sciences\, Meeting Room 2
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