6 citations · 12 across the 4 of their papers we have counts for
5 papers
Poisson structures on the conifold and local Calabi-Yau threefolds
Edoardo Ballico, Elizabeth Gasparim, Thomas Köppe +1
We describe bivector fields and Poisson structures on local Calabi-Yau threefolds which are total spaces of vector bundles on a contractible rational curve. In particular, we calcu…
Deformations of Noncompact Calabi-Yau threefolds
Elizabeth Gasparim, Thomas Köppe, Francisco Rubilar +1
We describe deformations of the noncompact Calabi-Yau threefolds $W_k = \mbox{Tot}(\mathcal{O}_{\mathbb{P}^1}(-k) \oplus \mathcal{O}_{\mathbb{P}^1}(k-2))$ for , as well as…
BPS state counting on singular varieties
Elizabeth Gasparim, Thomas Köppe, Pushan Majumdar +1
We define new partition functions for theories with targets on toric singularities via products of old partition functions on crepant resolutions. We compute explicit examples and…
Moduli and BPS configurations of the BLG theory
Shankhadeep Chakrabortty, Sudipto Paul Chowdhury, Thomas Köppe +1
We study the moduli space of scalars in the BLG theory with and without a constant background four-form field. The classical vacuum moduli space is sixteen-dimensional in the absen…
Sheaves on singular varieties
Elizabeth Gasparim, Thomas Köppe
We prove existence of reflexive sheaves on singular surfaces and threefolds with prescribed numerical invariants and study their moduli.