## Research

My research is in the broad areas of differential geometry and mathematical physics. Specifically, my work deals with Lie groupoids, Lie algebroids, symplectic geometry, Poisson geometry, and generalized geometry, often using the methods of differential graded geometry and higher category theory.

Preprint versions of all my papers are available on the arXiv.

My Google Scholar profile has (approximate) citation counts.

### Publications

- Double Lie algebroids and representations up to homotopy (with A. Gracia-Saz, M. Jotz Lean, and K. C. H. Mackenzie), Journal of Homotopy and Related Structures
**13**(2018), 287-319. - Constant symplectic 2-groupoids (with X. Tang), Letters in Mathematical Physics
**108**(2018), 1203-1223. - Symplectic structures on the integration of exact Courant algebroids (with X. Tang), Journal of Geometry and Physics
**127**(2018), 68-83. - VB-groupoids and representation theory of Lie groupoids (with A. Gracia-Saz), Journal of Symplectic Geometry
**15**(2017), no. 3, 741-783. - Modular classes of Lie groupoid representations up to homotopy, SIGMA
**11**(2015), 058, 10 pages. - The Atiyah class of a dg-vector bundle (with M. Stiénon and P. Xu), Comptes Rendus Mathématique
**353**(2015), no. 4, 357-362. - Lie algebroid modules and representations up to homotopy, Indagationes Mathematicae
**25**(2014), 1122-1134. - Differential graded contact geometry and Jacobi structures, Letters in Mathematical Physics
**103**(2013), 729-741. - L-infinity algebra actions (with M. Zambon), Differential Geometry and its Applications
**30**(2012), 576-587. - From double Lie groupoids to local Lie 2-groupoids (with X. Tang), Bulletin of the Brazilian Mathematical Society
**42**(2011), no. 4, 651-681. - On homotopy Poisson actions and reduction of symplectic Q-manifolds, Differential Geometry and its Applications
**29**(2011), 319-328. - Lie algebroid structures on double vector bundles and representation theory of Lie algebroids (with A. Gracia-Saz), Advances in Mathematics
**223**(2010), no. 4, 1236-1275. - Q-algebroids and their cohomology, Journal of Symplectic Geometry
**7**(2009), no. 3, 263-293. - Q-groupoids and their cohomology, Pacific Journal of Mathematics
**242**(2009), no. 2, 311-332. - Supergroupoids, double structures, and equivariant cohomology, UC Berkeley Ph.D. thesis.

### Slides/video/notes from some talks

- Constant symplectic 2-groupoids, April 2017 talk at Banff International Research Station, video here
- Representing representations up to homotopy
- Notes on Integration of DG symplectic manifolds via mapping spaces
- Integrating exact Courant algebroids
- Differential graded contact geometry
- Symplectic 2-groupoids and Courant algebroids (video from talk at Poisson 2012)
- Mathematics of the Falling Cat (Survey talk aimed at undergraduates, primarily based on a paper by Richard Montgomery)
- Double Lie groupoids, Lie 2-groupoids, and integration of Courant algebroids
- The fundamental group(oid) of a Lie groupoid
- Homotopy Poisson actions