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SUMMARY:Eran Assaf (MIT)
DTSTART:20250331T200000Z
DTEND:20250331T210000Z
DTSTAMP:20260423T040624Z
UID:NTBU/22
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NTBU/22/">Or
 thogonal modular forms from definite quaternary lattices</a>\nby Eran Assa
 f (MIT) as part of Boston University Number Theory Seminar\n\nLecture held
  in CDS Room 365 in Boston University.\n\nAbstract\nIn this talk I will ma
 ke precise the fact that definite quaternary orthogonal modular forms are 
 Hilbert modular forms. By taking the algebraic approach and using the Clif
 ford functor\, we can avoid analytic difficulties in the theta lifts\, and
  give a precise description of level and character on both sides of the tr
 ansfer map. Building on advancements in our understanding of orders in qua
 ternion algebras\, we are able to apply this result to a large class of la
 ttices\, allowing for singularities of high codimension. \nThis is joint w
 ork with Dan Fretwell\, Adam Logan\, Colin Ingalls\, Spencer Secord and Jo
 hn Voight.\n
LOCATION:https://researchseminars.org/talk/NTBU/22/
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