Works (32)
Updated: July 5th, 2023 15:50
2017 journal article
SB-labelings and posets with each interval homotopy equivalent to a sphere or a ball
JOURNAL OF COMBINATORIAL THEORY SERIES A, 152, 104–120.
author keywords: Poset topology; Mobius function; Crosscut complex; Tamari lattice; Weak order
TL;DR:
It is proved for finite lattices which admit an $SB$-labeling that each open interval has the homotopy type of a ball or of a sphere of some dimension.
(via Semantic Scholar)
open access via arxiv.org (repository)
Source: Web Of Science
Added: August 6, 2018
2016 journal article
From the weak Bruhat order to crystal posets
MATHEMATISCHE ZEITSCHRIFT, 286(3-4), 1435–1464.
author keywords: Crystal graph; Weak Bruhat order; Key map; Stembridge moves; Order complex
Source: Web Of Science
Added: August 6, 2018
2016 journal article
Representation Stability for Cohomology of Configuration Spaces in R-d
INTERNATIONAL MATHEMATICS RESEARCH NOTICES, 2017(5), 1433–1486.
UN Sustainable Development Goal Categories
4. Quality Education
(Web of Science)
5. Gender Equality
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2014 journal article
The q = -1 phenomenon via homology concentration
Journal of Combinatorics, 5(2), 167–194.
Source: Crossref
Added: July 28, 2019
2013 journal article
A lexicographic shellability characterization of geometric lattices
JOURNAL OF COMBINATORIAL THEORY SERIES A, 123(1), 8–13.
author keywords: Geometric lattice; Mobius function; Shellability; Order complex
TL;DR:
Geometric lattices are characterized in this paper as those finite, atomic lattices such that every atom ordering induces a lexicographic shelling given by an edge labeling known as a minimal labeling.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2013 journal article
Regular cell complexes in total positivity
INVENTIONES MATHEMATICAE, 197(1), 57–114.
Source: Web Of Science
Added: August 6, 2018
2013 journal article
Toric cubes
Rendiconti Del Circolo Matematico Di Palermo, 62(1), 67–78.
author keywords: Cube; CW complex; Monomial map; Toric variety; Somialgebraic set
UN Sustainable Development Goal Categories
15. Life on Land
(Web of Science)
Source: Crossref
Added: June 30, 2019
2012 journal article
Symmetric Chain Decomposition for Cyclic Quotients of Boolean Algebras and Relation to Cyclic Crystals
INTERNATIONAL MATHEMATICS RESEARCH NOTICES, 2013(2), 463–473.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: Web Of Science
Added: August 6, 2018
2010 journal article
Combinatorial constructions of weight bases: The Gelfand-Tsetlin basis
Electronic Journal of Combinatorics, 17(1).
Source: NC State University Libraries
Added: August 6, 2018
2010 journal article
Sorting orders, subword complexes, Bruhat order and total positivity
ADVANCES IN APPLIED MATHEMATICS, 46(1-4), 46–53.
author keywords: Bruhat order; Homotopy type; Quillen Fiber Lemma; Weak order
TL;DR:
A poset map from a Boolean algebra to the Bruhat order is constructed which unveils an interesting connection between subword complexes, sorting orders, and certain totally nonnegative spaces and gives a simple new proof that the proper part of Bru Hat order is homotopy equivalent to the proper parts of a Booleangebra - that is, to a sphere.
(via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018
2009 other
A multiplicative deformation of the Möbius function for the poset of partitions of a multiset
TL;DR:
A multiplicative deformation is introduced, denoted μ, for the Möbius function of the poset of partitions of a multiset and it is shown that it possesses much more elegant formulas than the usual MöBius function in this case.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
2009 chapter
Maximum likelihood estimation in latent class models for contingency table data
In P. Gibilisco, E. Riccomagno, M. P. Rogantin, & H. P. Wynn (Eds.), Algebraic and Geometric Methods in Statistics (pp. 27–62).
Ed(s): P. Gibilisco, E. Riccomagno, M. Rogantin & H. Wynn
Source: Crossref
Added: June 30, 2019
2009 journal article
Random walks on quasisymmetric functions
Advances in Mathematics, 222(3), 782–808.
author keywords: Quasisymmetric function; Descent algebra; Random walk; Markov chain
Source: Crossref
Added: June 30, 2019
2009 journal article
Shelling Coxeter-like complexes and sorting on trees
ADVANCES IN MATHEMATICS, 221(3), 812–829.
author keywords: Shellability; Weak order; Sorting; Coxeter complex; Chessboard complex
Source: Web Of Science
Added: August 6, 2018
2009 journal article
The q=-1 phenomenon for bounded (plane) partitions via homology concentration
Discrete Mathematics and Theoretical Computer Science, 471–484.
Source: NC State University Libraries
Added: July 10, 2019
2007 journal article
Chains of Modular Elements and Lattice Connectivity
Order, 23(4), 339–342.
TL;DR:
It is shown that the order complex of any finite lattice with a chain of modular elements is at least (r−2)-connected.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
2007 journal article
Coloring complexes and arrangements
Journal of Algebraic Combinatorics, 27(2), 205–214.
author keywords: convex ear decomposition; chromatic polynomial; coloring complex
Source: Crossref
Added: June 30, 2019
2006 journal article
Combinatorics of multigraded Poincaré series for monomial rings
Journal of Algebra, 308(1), 73–90.
author keywords: Poincare series; monomial rings; poset homology; diagonal arrangements
Source: Crossref
Added: June 30, 2019
2005 chapter
Gröbner basis degree bounds on Tor•^K[Λ](k, k)• and discrete Morse theory for posets
In A. Barvinok, M. Beck, C. Haase, B. Reznick, & V. Welker (Eds.), Integer Points in Polyhedra-geometry, number theory, algebra, optimization (pp. 101–138).
Ed(s): A. Barvinok, M. Beck, C. Haase, B. Reznick & V. Welker
Source: NC State University Libraries
Added: August 18, 2019
2005 journal article
On optimizing discrete Morse functions
Advances in Applied Mathematics, 35(3), 294–322.
TL;DR:
Under what conditions may several gradient paths in a discrete Morse function simultaneously be reversed to cancel several pairs of critical cells, to further collapse the complex, and which gradient paths are individually reversible in lexicographic discrete Morse functions on poset order complexes be addressed.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
2004 journal article
Transactions of the American Mathematical Society, 357(02), 509–535.
Source: Crossref
Added: June 30, 2019
2004 journal article
A Hodge decomposition for the complex of injective words
Pacific Journal of Mathematics, 214(1), 109–125.
Source: Crossref
Added: June 30, 2019
2003 journal article
A partitioning and related properties for the quotient complex Δ(Blm)/Sl≀Sm
Journal of Pure and Applied Algebra, 178(3), 255–272.
Source: Crossref
Added: June 30, 2019
2003 journal article
Chain decomposition and the flag f-vector
Journal of Combinatorial Theory, Series A, 103(1), 27–52.
TL;DR:
This work provides formulas for Fp for three classes of locally rank-symmetric posets: graded monoid posets, generalized posets of shuffles and noncrossing partition lattices for classical reflection groups, and flag f-vector expressions for generalized shuffle posets and nonCrossing partitions lattices, which yield symmetric chain decompositions and shellability and supersolvability results.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
2003 journal article
Connectivity of h-complexes
Journal of Combinatorial Theory, Series A, 105(1), 111–126.
author keywords: discrete morse function; h-vector; Charney-Davis quantity
TL;DR:
This paper verifies a conjecture of Edelman and Reiner regarding the homology of the h-complex of a Boolean algebra by constructing a discrete Morse function with no low-dimensional critical cells, implying a lower bound on connectivity.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
2003 journal article
Lexicographic Shellability for Balanced Complexes
Journal of Algebraic Combinatorics, 17(3), 225–254.
author keywords: shellability; Boolean cell complex; simplicial poset; partition lattice; wreath product
Source: Crossref
Added: July 10, 2019
2003 journal article
Multiplicity of the trivial representation in rank-selected homology of the partition lattice
Journal of Algebra, 266(2), 521–538.
Source: Crossref
Added: June 30, 2019
2002 journal article
A Short Simplicial h -Vector and the Upper Bound Theorem
Discrete & Computational Geometry, 28(3), 283–289.
TL;DR:
The Upper Bound Conjecture is verified for a class of odd-dimensional simplicial complexes that in particular includes all Eulerian simplicialcomplex with isolated singularities, and relies on a new invariant of simplicial complex—a short simplicial h -vector.
(via Semantic Scholar)
Source: Crossref
Added: July 28, 2019
2002 journal article
Two Generalizations of Posets of Shuffles
Journal of Combinatorial Theory, Series A, 97(1), 1–26.
TL;DR:
A quasi-symmetric function encoding for the flag f-vector, denoted FP, is defined, and this leads to several combinatorial formulas as well as proofs that shuffle posets of multisets are supersolvable and have symmetric chain decompositions.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
1999 thesis
Decomposition and Enumeration in Partially Ordered Sets
(Ph.D. thesis). Massachusetts Institute of Technology.
Source: NC State University Libraries
Added: July 10, 2019
1999 journal article
Deformation of chains via a local symmetric group action
The Electronic Journal of Combinatorics, R27.
Source: NC State University Libraries
Added: July 28, 2019
1999 journal article
On exact n-step domination
Discrete Mathematics, 205(1-3), 235–239.
TL;DR:
It is proved that such subsets of a graph G have order at least ⌊ log 2 n⌋+2 and limit how much better a bound is possible and a related minimization problem for which a lower bound is found.
(via Semantic Scholar)
Source: Crossref
Added: June 30, 2019
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