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DTSTART:20220313T070000
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DTSTART:20211107T060000
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DTSTART;TZID=America/Toronto:20221020T130000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-co
 mbinatorics-seminar-sheila-sundaram
SUMMARY:Algebraic Combinatorics Seminar - Sheila Sundaram
CLASS:PUBLIC
DESCRIPTION:TITLE: Quasisymmetric functions\,  descent sets\, immaculate t
 ableaux\,\nand 0-Hecke modules\n\nSpeaker:\n Shelia Sundaram\n\nAffiliatio
 n:\n  \n\nLocation:\n MC 5479 or contact Olya Mandelshtam for Zoom link\n
 \nABSTRACT: \n\nThe first half of this talk will be expository and devoted
  to a\ndiscussion of (quasi)symmetric functions and tableaux.\n\nWe define
  new families of quasisymmetric functions\, in particular the\nnew basis o
 f row-strict dual immaculate functions\, with an associated\ncyclic\, inde
 composable 0-Hecke algebra module. Our row-strict\nimmaculate functions ar
 e related to the dual immaculate functions of\nBerg-Bergeron-Saliola-Serra
 no-Zabrocki (2014-15) by the involution\n\\psi on the ring Qsym of quasisy
 mmetric functions. We uncover the\nremarkable properties of the immaculate
  Hecke poset induced by the\n0-Hecke action on standard immaculate tableau
 x\, revealing other\nsubmodules and quotient modules\, often cyclic and in
 decomposable.
DTSTAMP:20260420T022901Z
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