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Publications

"the recent development of combinatorics is somewhat of a cinderella story. It used to be looked down on by “mainstream” mathematicians as being somehow less respectable than other areas, in spite of many services rendered to both pure and applied mathematics. Then along came the prince of computer science with its many mathematical problems and needs — and it was combinatorics that best fitted the glass slipper held out."

- Anders Björner and Richard Stanley - 

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2025​

 

The nonsymmetric shuffle theorem 

arXiv: 2509.24040

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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Minimal elements in the skew extended 0-Hecke poset 

arXiv: 2509.05918

joint with Nadia Lafrenière, Rosa Orellana, Sheila Sundaram, Stephanie van Willigenburg, and Tamsen Whitehead McGinley

 

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Flagged LLT polynomials, nonsymmetric plethysm, and nonsymmetric Macdonald polynomials

arXiv: 2506.09015

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger 

 

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Dens, nests and the Loehr-Warrington conjecture

J. Amer. Math. Soc., Vol 38, Number 4, June 2025, Pages 1049 – 1106

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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The skew immaculate Hecke poset and 0-Hecke modules

Electron. J. Combin.,  Vol 32, Number 2, 2025, #P2.11

joint with Nadia Lafrenière, Rosa Orellana, Sheila Sundaram, Stephanie van Willigenburg, and Tamsen Whitehead McGinley

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A raising operator formula for Macdonald polynomials

Forum of Mathematics. Sigma, 13 (2025), p. e47

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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On the correspondence between integer sequences and vacillating tableaux Enumerative Combinatorics and Applications, Vol 5, Number 1, 2025, #S2R7

joint with Zhanar Berikkyzy, Pamela E. Harris, Catherine Yan and Chenchen Zhao

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​2024

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On the Limiting Vacillating Tableaux for Integer Sequences

Journal of Combinatorics, Vol 15, Number 3, 2024, Pages 383 – 400

joint with Zhanar Berikkyzy, Pamela E. Harris, Catherine Yan and Chenchen Zhao

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Demazure crystals and the Schur positivity of Catalan functions

Inventiones mathematicae, 236, 483 – 547 (2024)

joint with Jonah Blasiak and Jennifer Morse

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Combinatorial Identities for Vacillating Tableaux 

Integers, 24A, #A4 (2024)

joint with Zhanar Berikkyzy, Pamela E. Harris, Catherine Yan and Chenchen Zhao

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LLT polynomials in the Schiffmann algebra

Journal für die reine und angewandte Mathematik (Crelles Journal), vol. 2024, no. 811, 2024, pp. 93133.

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger​

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2023

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A Catalanimal formula for Macdonald polynomials (Extended Abstract)​

Seminaire Lotharingien de Combinatoire 89B (2023) Article #85, 12 pp., Proceedings of the 35th Conference on Formal Power Series and Algebraic Combinatorics (Davis)

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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​A proof of the Extended Delta Conjecture

Forum of Mathematics. Pi, 11 (2023), no. e6, 28

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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​A Shuffle Theorem for Paths Under Any Line

Forum of Mathematics. Pi, 11 (2023), no. e5, 38

joint with Mark Haiman, Jonah Blasiak, Jennifer Morse and George H. Seelinger

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2021

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Distribution properties for t-hooks in partitions

Annals of Combinatorics, 25(3), 677695 (2021)

joint with William Craig

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A note on the Higher order Turán inequalities for k-regular partitions

Research in Number Theory, 7 (2021), no. 1, Paper No. 5, 7 pp.

joint with William Craig

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​Note: Hermite's criterion on page 2 is not stated correctly. It should be "f  is hyperbolic if and only if M(f) is positive definite." The error has no bearing on any results in the paper.

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2020

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Higher order Turán inequalities for k-regular partitions(Extended Abstract)

Seminaire Lotharingien de Combinatoire 84B (2020), Proceedings of the 32nd Conference on Formal Power Series and Algebraic Combinatorics (Online) 2020, Article 21.

​joint with William Craig

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k-Schur expansions of Catalan functions

Advances in Mathematics, Vol 371, 16 September 2020, 107209​

joint with Jonah Blasiak, Jennifer Morse and Daniel Summers

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​2019​

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Catalan functions and k-Schur positivity

J. Amer. Math. Soc., Vol 32, Number 4, October 2019, Pages 921 – 963

joint with Jonah Blasiak, Jennifer Morse and Daniel Summers

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2016

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On Decomposition of the Product of Demazure Atoms and Demazure Characters arXiv: 1606.02291

 

Decomposition of the product of a monomial and a Demazure atom

Discrete Math. Theor. Comput. Sci., Proceedings of the FPSAC 2016 conference, volume (2016), 1015 1026.

 

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2012

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A geometric proof of a theorem on antiregularity of generalized quadrangles

Designs, Codes and Cryptography (2012), 64, 255 263.

joint with Dr. Philip Pit Wang Wong​​​​​

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