Academic Degrees

August 2000 
Ph.D. in Mathematics (under the supervision of Doug. West), University of Illinois.

June 1994 
B.S. in Computer Science (with distinction), Zhejiang University.

Academic Positions

July 2010  present 
Professor , Miami University.

July 2006  June 2010 
Associate Professor , Miami University.

August 2001  July 2006 
Assistant Professor , Miami University.

August 2000  August 2001 
Assistant Professor , Michigan Technological University.

September 1994  June 2000 
Teaching/Research assistant , University of Illinois,
UrbanaChampaign

Honors 
Fall 2007 
Distinguished scholar award, Miami University
(In recognition of scholarship of a junior faculty member, one per year, selected campuswide)

Spring 2001 
Outstanding Faculty Research Award , Mathematical Sciences,
Michigan Technological University

Spring 2000 
HohnNash Award , University of Illinois at UrbanaChampaign
(In recognition of outstanding scholarship and promise in applied
mathematics. Two recipients are selected each year.) 
March 1997  present 
Honor Society of Phi Kappa Phi

Grants 
1/2007  1/2009 
National Security Agency Young Investigator Grant ``Extremal problems on color
structures in edgecolorings of graphs"

9/2013  8/2014 
Simons Foundation Collaboration Grant for Mathematicians ``Extremal problems on graphs,
hypergraphs, and set systems"

7/2014  6/2017 
National Science Foundation Grant
``Extremal Problems for sparse hypergraphs and graphs",

7/2019  6/2022 
National Science Foundation Grant
``Extremal Problems on graphs and hypergraphs",

Other Funded research program 
4/2016  4/2018 
American Institute of Mathematics Structured Quartet Research Ensembles (with Z. Furedi, A. Kostochka,
D. Mubayi, J. Verstraete)

Recent talks

 ``Many Turan exponents via subdivisions", American Mathematical Society Sectional
Meeting, Gainesville, FL, Fall 2019.
 ``On a hypergraph Turan problem", American Mathematical Society Sectional
Meeting, Madison, WI, Fall 2019.
 ``On Turan exponents of bipartite graphs", American Mathematical Society Sectional
Meeting, Ann Arbor, MI, Fall 2018.
 ``On Turan exponents of bipartite graphs", SIAM Meeting on Discrete Mathematics,
Denver, CO, June, 2018.
 ``Supersaturation of even linear cycles in linear hypergraphs", American Mathematical Society Sectional
Meeting, BUffalo, NY, Fall 2017.
 ``Turan numbers of small subdivisions", SIAM Meeting on Discrete Mathematics, Atlanta, GA, June 2018.
 ``Turan problems for sparse hypergraphs", SIAM Meeting on Discrete Mathematics, Atlanta, GA, June 2018.
 ``Hypergraph Turan numbers via Lagrangians", American Mathematical Society Sectional Meeting,
Salt Lake City, UT, Spring 2016.
 ``Turan problems for sparse hypergraphs", Atlanta Lectures Series on Graphs and Combinatorics,
Atlanta, GA, Fall 2015
 ``The Turan problem for hypergraph forests", WestFest,
a birthday conference in honor of Doug West's 60th birthday, Minneapolis, MN, Summer 2014.
 ``The Turan problem for hypergraph forests", WestFest,
a birthday conference in honor of Doug West's 60th birthday, Minneapolis, MN, Summer 2014.
 ``The Turan problem for hypergraph forests", SIAM Discrete Mathematics Meeting, Minneapolis, MN, Summer 2014.
 "The expansion method in Turan problems",
MittagLeffler Institute Special semester in graphs,
hypergraphs, and computing, Stockholm, Sweden, Spring 2014.
 "Two Turan results on graphs and hypergraphs",
American Mathematical Society Sectional Meeting, Louisville, KY, Fall 2013.
 "Hypergraph Turan and Ramsey results on linear cycles",
EXCILL 2: Extremal Combinatorics at Illinois, Urbana, IL, Spring 2013.
 "Hypergraph Turan numbers of linear cycles", American Mathematical Society Annual Meeting, San Diego, CA, Winter 2013.
 "Hypergraph Turan numbers of linear cycles", American Mathematical Society Sectional Meeting, Akron, OH, Fall 2012.
 "Turan numbers of expanded hypergraphs", Oberwolfach workshop on Hypergraph Turan problems, Oberwolfach, Germany, Spring 2012.
 "Codegree threshold of the Fano plane", Oberwolfach workshop on Hypergraph Turan problems, Oberwolfach, Germany, Spring 2012.
 "Set families with a forbidden induced subposet", American Mathematical
Society Sectional Meeting, Washington, DC, Spring 2012.
 "Turan numbers of expanded hypergraphs", American Mathematical Society Sectional Meeting, Tampa, FL, Spring 2012.
 "Hypergraph Turan numbers of uniform linear paths", American Mathematical Society Sectional Meeting,
Winston Salem. NC, Fall 2011.
 "Turan numbers of subdivided graphs", SIAMSEAS Southeast Section Meeting, Charlotte, NC,
Spring 2011.
 "Turan numbers of subdivided graphs",
American Mathematical Society Sectional Meeting, Richmond, VA, Fall 2010.
 "Set systems without a strong simplex", American Mathematical Society Sectional Meeting,
St. Paul, MN, Spring 2010.
 "Some Turan type results", SIAM Annual Meeting, Denver, CO, Summer 2009.
 "Compact topological cliques in sparse graphs", American Mathematical Society Sectional Meeting,
Urbana, IL , 2009.
