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SUMMARY:Johann Thiel (New York College of Technology (CUNY)
DTSTART:20260714T130000Z
DTEND:20260714T132500Z
DTSTAMP:20260710T110919Z
UID:CANT2026/21
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CANT2026/21/
 ">Generating functions for maximally expanded α-trees</a>\nby Johann Thie
 l (New York College of Technology (CUNY) as part of Combinatorial and addi
 tive number theory seminar (CANT 2026)\n\nLecture held in Science Center i
 n the CUNY Graduate Center (4th floor).\n\nAbstract\nWe construct generati
 ng functions whose coefficients enumerate certain directed planar trees kn
 own as maximally expanded $\\alpha$-trees. We show that the number of such
  trees can be expressed as an integer linear combination of Catalan number
 s. This is joint work with David M. Bradley.\n
LOCATION:https://researchseminars.org/talk/CANT2026/21/
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