178 citations
- University of TorontoCA40 papers
- York UniversityCA39 papers
- University of WaterlooCA13 papers
- Alexandru Ioan Cuza UniversityRO8 papers
- McMaster UniversityCA8 papers
- Université du Québec à MontréalCA7 papers
- Centre National de la Recherche ScientifiqueFR6 papers
- University of HelsinkiFI6 papers
- University of WashingtonUS6 papers
- Carleton UniversityCA5 papers
- University of AlbertaCA5 papers
- University of British ColumbiaCA5 papers
6 papers · 1 filter
Hermitian star products are completely positive deformations
Henrique Bursztyn, Stefan Waldmann
Let M be a Poisson manifold equipped with a Hermitian star product. We show that any positive linear functional on C^\infty(M) can be deformed into a positive linear functional wit…
When is a Schubert variety Gorenstein?
Alexander Woo, Alexander Yong
A (normal) variety is Gorenstein if it is Cohen-Macualay and its canonical sheaf is a line bundle. This property, which measures the ``pathology'' of the singularities of a variety…
Quiver varieties and Demazure modules
Alistair Savage
Using subvarieties, which we call Demazure quiver varieties, of the quiver varieties of Nakajima, we give a geometric realization of Demazure modules of Kac-Moody algebras with sym…
Decomposable compositions, symmetric quasisymmetric functions and equality of ribbon Schur functions
Louis J. Billera, Hugh Thomas, Stephanie van Willigenburg
We define an equivalence relation on integer compositions and show that two ribbon Schur functions are identical if and only if their defining compositions are equivalent in this s…
Generalized complex structures on nilmanifolds
Gil R. Cavalcanti, Marco Gualtieri
We show that all 6-dimensional nilmanifolds admit generalized complex structures. This includes the five classes of nilmanifold which admit no known complex or symplectic structure…
Graded left modular lattices are supersolvable
Hugh Thomas
We provide a direct proof that a finite graded lattice with a maximal chain of left modular elements is supersolvable. This result was first established via a detour through EL-lab…