Now showing items 1-6 of 6

• #### The C-Map as a Functor on Certain Variations of Hodge Structure ﻿

[OWP-2021-04] (Mathematisches Forschungsinstitut Oberwolfach, 2021-03-15)
We give a new manifestly natural presentation of the supergravity c-map. We achieve this by giving a more explicit description of the correspondence between projective special Kähler manifolds and variations of Hodge ...
• #### The Elser Nuclei Sum Revisited ﻿

[OWP-2021-05] (Mathematisches Forschungsinstitut Oberwolfach, 2021-03-16)
Fix a finite undirected graph $\Gamma$ and a vertex $v$ of $\Gamma$. Let $E$ be the set of edges of $\Gamma$. We call a subset $F$ of $E$ $\textit{pandemic}$ if each edge of $\Gamma$ has at least one endpoint that can be ...
• #### Homology and $K$-Theory of Torsion-Free Ample Groupoids and Smale Spaces ﻿

[OWP-2020-20] (Mathematisches Forschungsinstitut Oberwolfach, 2020-10-09)
Given an ample groupoid, we construct a spectral sequence with groupoid homology with integer coefficients on the second sheet, converging to the $K$-groups of the groupoid C*-algebra when the groupoid has torsion-free ...
• #### Hopf Algebras in Combinatorics, Volume 1 ﻿

[OWP-2020-14] (Mathematisches Forschungsinstitut Oberwolfach, 2020-07-29)
• #### Hopf Algebras in Combinatorics, Volume 2 ﻿

[OWP-2020-15] (Mathematisches Forschungsinstitut Oberwolfach, 2020-07-30)
• #### The Pelletier-Ressayre Hidden Symmetry for Littlewood-Richardson Coefficients ﻿

[OWP-2020-18] (Mathematisches Forschungsinstitut Oberwolfach, 2020-09-08)
We prove an identity for Littlewood–Richardson coefficients conjectured by Pelletier and Ressayre. The proof relies on a novel birational involution defined over any semifield.