# Xin Zhou

### Assistant Professor

South Hall, Room 6501
University of California Santa Barbara
Santa Barbara, California 93106 USA
E-mail:   zhou "at" math.ucsb.edu

## Conference:

Current Teaching: Math 8: Transition to higher mathematics.

I am organizing the UCSB Differential Geometry Seminar.

I am a member of the Geometry group. Before moving to UCSB, I was a CLE Moore instructor in the Math department at MIT. I received my PhD from Stanford University in 2013 with Richard M. Schoen as my advisor. Here is my Curriculum Vitae.

### Research Interest:

• Differential Geometry, Calculus of Variations, General Relativity.

### Preprints:

1. Min-max via minimal filling I: three manifold (with S. T. Yau), preprint.
2. Compactness and generic finiteness for free boundary minimal hypersurfaces (with Qiang Guang), arXiv:1803.01509.
3. Free boundary minimal hypersurfaces with least area (with Qiang Guang and Zhichao Wang), arXiv:1801.07036.
4. Min-max theory for CMC hypersurfaces (with Jonathan Zhu), arXiv:1707.08012.
5. A maximum principle for free boundary minimal varieties of arbitrary codimension (with Martin Li), arXiv:1708.05001.
6. Min-max theory for free boundary minimal hypersurfaces I - regularity theory (with Martin Li), arXiv:1611.02612.

### Publications:

1. Curvature estimates for stable free boundary minimal hypersurfaces (with Qiang Guang and Martin Li), accepted by J. Reine Angew. Math (Crelle's Journal), arXiv:1611.02605.
2. Sweeping out 3-manifold of positive Ricci curvature by short 1-cycles via estimates of min-max surfaces (with Y. Liokumovich), International Mathematics Research Notices, Volume 2018, Issue 4, 20 .
3. Entropy of closed surfaces and min-max theory (with D. Ketover), accepted by J. Differential Geometry, arXiv:1509.06238.
4. Existence of minimal surfaces of arbitrarily large Morse index (with Haozhao. Li), Calculus of Variations and Partial Differential Equations, 2016, 55(3), 1-12.
5. Min-max hypersurface in manifold of positive Ricci curvature, J. Differential Geometry, 105 (2017), 291-343.
6. On the free boundary min-max geodesics, International Mathematics Research Notices Vol. 2016, No. 5, pp. 1447-1466.
7. Min-max minimal hypersurface in $(M^{n+1}, g)$ with $Ric_{g}>0$ and $2\leq n\leq 6$, J. Differential Geometry, 100 (2015) 129-160.
8. Mass angular momentum inequality for axisymmetric vacuum data with small trace, Communication in Analysis and Geometry, 22, (2014) 519-571.
9. Convexity of reduced energy and mass angular momentum inequalities (with R. Schoen), Ann. Henri Poincar\'e, 14 (2013), 1747-1773.
10. On the existence of min-max minimal surfaces of genus g≥ 2, Commun. Contemp. Math., 19, 1750041 (2017).
11. On the existence of min-max minimal torus, J. Geom. Anal. 20 (2010), 1026-1055.

### Research reports and surveys:

1. Min-max theory for constant mean curvature (CMC) hypersurfaces (with Jonathan Zhu), Partial Differential Equations, Oberwolfach Report No. 35/2017.
2. On minimal surfaces with free boundary (with Martin Li), special issues of ICCM Notices, to appear.
3. Recent progress on compactness of minimal surfaces with free boundary (with Qiang Guang), Proceeding of the Workshop on Geometric Analysis 2017, to appear.