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SUMMARY:Martha Yip (University of Kentucky)
DTSTART:20261025T170000Z
DTEND:20261025T180000Z
DTSTAMP:20261023T115439Z
UID:MAAGC2026/7
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MAAGC2026/7/
 ">Flag positroid pipe dreams</a>\nby Martha Yip (University of Kentucky) a
 s part of MAAGC 2026\n\nLecture held in Temple 1169.\n\nAbstract\nWe intro
 duce flag positroid pipe dreams (FPPs)\, whose role in the study of comple
 te flag positroids is analogous to the role of Le-diagrams in the study of
  positroids. FPPs are in bijection with intervals in the Bruhat order and 
 hence index Richardson cells in the decomposition of the nonnegative flag 
 variety. In this talk\, we will show how a flag positroid can be built ran
 k by rank via FPPs\, and conversely given an FPP\, how to recover the cons
 tituents of its associated complete flag positroid in terms of their Le-di
 agrams. As an application\, we address a problem posed by Chen et al. rega
 rding a characterization of elementary positroid quotients via the cyclic 
 shift operators of Benedetti et al.\n
LOCATION:https://researchseminars.org/talk/MAAGC2026/7/
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