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math.CO2022
The Endomorphism Conjecture for Graded Posets of Width 4
Miklós Bóna, Ryan R. Martin
We prove the endomorphism conjecture for graded posets whose largest Whitney number is at most 4. In particular, this implies the endomorphism conjecture is true for graded posets…
math.CO2010
Lower bounds for identifying codes in some infinite grids
Ryan Martin, Brendon Stanton
An -identifying code on a graph is a set such that for every vertex in , the intersection of the radius- closed neighborhood with is nonempty an…