CL-Shellable Posets with No EL-Shellings

2019/07/16 by Li, Tiansi
#Combinatorics (math.CO) #FOS: Mathematics

paper · doi:10.48550/arxiv.1907.06833

Abstract

We construct an ungraded CL-shellable poset and a graded CL-shellable poset and show that neither is EL-shellable.

Related

• Equivalences and Distinctions in Lexicographic Shellability of Posets
• Segre powers of posets preserve EL-shellability
• Shellability of Kohnert posets
• Obstructions to Shellability
• Shellability is NP-complete