Publications and Preprints  
    
    
Direct sum decomposability of smooth polynomials  on  (May 2017), 10pp.Stability of associated forms  (joint with Alexander Isaev) on  (March 2017), 26pp.GIT semistability of Hilbert points of Milnor algebras  on  
Math. Ann.  367 (2017), no. 1-2, 441--460 ().Semiampleness criteria for divisors on $\overline{M}_{0,n}$ , submitted, 36pp. An accompanying SAGE worksheet  
A major revision (June 2015) of an earlier  now incorporates new results and Item (13) below.Second flip in the Hassett-Keel program: A local description  (joint with Jarod Alper, David Smyth, and Fred van der Wyck) 
Compositio Mathematica , 153 (2017), no. 8, 1547-1583 ().Second flip in the Hassett-Keel program: Existence of good moduli spaces  (joint with Jarod Alper and David Smyth) 
Compositio Mathematica , 153 (2017), no. 8, 1584-1609 ().Second flip in the Hassett-Keel program: Projectivity  (joint with Jarod Alper and David Smyth), 
International Mathematics Research Notices ,  (December 2016), 45pp.Toward GIT stability of syzygies of canonical curves  (joint with  and David Swinarski) on  
 Algebraic Geometry  3 (2016), no. 1, 1-22 () Groebner techniques and ribbons  (joint with  and David Swinarski), 
Albanian J. Math.  8 (2014), no. 2, 55-70 ()New nef divisors on $\overline{M}_{0,n}$  on . 
Not for publication, subsumed by Item (19) above; contains a precursor of a combinatorial criterion for semiampleness that is used in Item (19) and proves Conjecture 1.7 from the earlier 
Type A level one conformal blocks divisors revisited , 2011.Singularities with G_m-action and the log minimal model program for $\overline{M}_g$  (joint with Jarod Alper and David Smyth), 
Journal fur die reine und angewandte Mathematik,  2016 (2016), no. 721, 1-41 ()GIT of genus five canonical curves  (joint with David Smyth) on  
A Celebration of Algebraic Geometry , 281-310, Clay Mathematics Proceedings, vol. 18, CMI/AMS, 2013.Moduli spaces of hyperelliptic curves with A and D singularities  
Mathematische Zeitschrift  276 (2013) no. 1--2, 299-328 ()Finite Hilbert stability of (bi)canonical curves  (joint with Jarod Alper and David Smyth) 
Inventiones mathematicae  191 (2013) no. 3, 671-718 ( 
*The final publication is available at  Stability of 2nd Hilbert points of canonical curves  (joint with David Jensen) 
 Int. Math. Res. Notices,  2013 (2013) no. 22: 5270-5287 ()The final log canonical model of the moduli space of stable curves of genus four  
 Int. Math. Res. Notices,  2012 (2012) no. 24: 5650-5672 ()Cyclic covering morphisms on $\overline{M}_{0,n}$  (with an appendix by Anand Deopurkar, 2013); an older version on Alternate compactifications of moduli spaces of curves  (joint with David Smyth) on  
in Handbook of Moduli: Volume I , 331-414, editors Gavril Farkas and Ian Morrison, , Int. Press, Somerville, MA, 2013Moduli spaces of weighted stable curves and log canonical models of M_{g,n}  
Math. Res. Lett. , 18 (2011) no. 4, 663-675 ()Ample divisors on moduli spaces of pointed rational curves  (joint with David Smyth) 
J. Algebraic Geom.,  20 (2011) no. 4, 599-629 ()Severi varieties and the moduli space of curves  (Harvard dissertation) on Rigidity and polynomial invariants of convex polytopes (joint with Igor Pak) 
Duke Math. J.,  129 (2005), no. 2, 371-404 ()