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    <title><string language="fre"><![CDATA[Joseph Fu - Integral geometric regularity (Part 2)]]></string></title>
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        <string language="fre"><![CDATA[In the original form given by Blaschke 
in the 1930s, the famous Principal Kinematic Formula expresses the Euler
 characteristic of the intersection of two sufficiently regular objects 
in euclidean space, integrated over the space of all possible relative 
positions, in terms of geometric invariants associated to each of them 
individually. It is natural to wonder about the precise regularity 
needed  for this to work. The question turns on the existence of the 
normal cycle  of such an object A, i.e. an integral current that stands 
in for its manifolds of unit normals if A is too irregular for the 
latter to exist in a literal sense. Despite significant recent progress,
 a comprehensive understanding of this construction remains maddeningly 
elusive. In these lectures we will discuss both of these aspects.]]></string></description>
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            <date><dateTime>2015-06-23</dateTime></date>
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