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math.CO2021
Determinantal formulas with major indices
Thomas McConville, Donald Robertson, Clifford Smyth
We give a simple proof of a major index determinant formula in the symmetric group discovered by Krattenthaler and first proved by Thibon using noncommutative symmetric functions.…
math.CO2018
A proof of a sumset conjecture of Erdős
Joel Moreira, Florian Karl Richter, Donald Robertson
In this paper we show that every set with positive density contains for some pair of infinite subsets of , settling a conjecture of E…