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SUMMARY:Romyar Sharifi (UCLA)
DTSTART:20200413T230000Z
DTEND:20200413T235000Z
DTSTAMP:20260423T022923Z
UID:UCLA_NTS/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UCLA_NTS/1/"
 >Eisenstein cocycles in motivic cohomology</a>\nby Romyar Sharifi (UCLA) a
 s part of UCLA Number Theory Seminar\n\n\nAbstract\nI will describe joint 
 work with Akshay Venkatesh on the construction of GL_2(Z)-cocycles valued 
 in second K-groups of the function fields of the squares of the multiplica
 tive group over the rationals and a universal elliptic curve.  Focusing on
  the first case\, I’ll explain how the cocycle we construct specializes 
 to homomorphisms taking modular symbols for congruence subgroups to specia
 l elements in second cohomology groups of cyclotomic fields and satisfies 
 a certain property of being “Eisenstein”.\n
LOCATION:https://researchseminars.org/talk/UCLA_NTS/1/
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