Maksym Fedorchuk

Associate Professor

Email: fedorchm[at]
Tel: 617-552-3757

Department of Mathematics
Boston College
Maloney Hall 570
140 Commonwealth Avenue
Chestnut Hill, MA 02467

Curriculum Vitae


I am an algebraic geometer, interested in moduli problems and attendant GIT constructions.

Publications and preprints

  1. Associated form morphism (joint with Alexander Isaev), July 2018, 18pp.

  2. VGIT presentation of the second flip of $\overline{M}_{2,1}$ (joint with Matthew Grimes), preprint on arXiv:1805.08581, revision as of June 2018, 24pp.

  3. Geometric Invariant Theory of syzygies, with applications to moduli spaces, preprint on arXiv:1712.02776
    to appear in the proceedings of Abel Symposium 2017 Geometry of moduli, 23pp.

  4. Direct sum decomposability of polynomials and factorization of associated forms (revision as of August 2017), preprint on arXiv:1705.03452, 17pp.
    A short Macaulay2 package co-written by Z.Fang and J.Kim (supported by Summer 2017 BC URF) determines if a homogeneous polynomial with a nonzero discriminant over the rationals is a direct sum and computes a direct sum decomposition when it exists.

  5. Stability of associated forms (joint with Alexander Isaev) on arXiv:1703.00438 (revision as of January 2018)
    to appear in Journal of Algebraic Geometry, 20pp.

  6. GIT semistability of Hilbert points of Milnor algebras on arXiv:1508.06991
    Math. Ann. 367 (2017), no. 1-2, 441-460 (journal version).

  7. Semiampleness criteria for divisors on $\overline{M}_{0,n}$, submitted, 36pp. An accompanying SAGE worksheet
    A major revision (June 2015) of an earlier arXiv:1407.7839 now incorporates new results and Item (13) below.

  8. 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 (journal version).

  9. 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 (journal version).

  10. Second flip in the Hassett-Keel program: Projectivity (joint with Jarod Alper and David Smyth),
    International Mathematics Research Notices 2017 (2017), no. 24, 7375-7419 (journal version)

  11. Toward GIT stability of syzygies of canonical curves (joint with Anand Deopurkar and David Swinarski) on arXiv:1401.6101
    Algebraic Geometry 3 (2016), no. 1, 1-22 (journal version)

  12. Groebner techniques and ribbons (joint with Anand Deopurkar and David Swinarski),
    Albanian J. Math. 8 (2014), no. 2, 55-70 (journal version)

  13. New nef divisors on $\overline{M}_{0,n}$ on arXiv:1308.5993.
    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.

  14. 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 (journal version)

  15. GIT of genus five canonical curves (joint with David Smyth) on arXiv:1302.4804
    A Celebration of Algebraic Geometry, 281-310, Clay Mathematics Proceedings, vol. 18, CMI/AMS, 2013.

  16. Moduli spaces of hyperelliptic curves with A and D singularities
    Mathematische Zeitschrift 276 (2013) no. 1--2, 299-328 (journal version)

  17. Finite Hilbert stability of (bi)canonical curves (joint with Jarod Alper and David Smyth)
    Inventiones mathematicae 191 (2013) no. 3, 671-718 (journal version)
    *The final publication is available at

  18. Stability of 2nd Hilbert points of canonical curves (joint with David Jensen)
    Int. Math. Res. Notices, 2013 (2013) no. 22: 5270-5287 (journal version)

  19. 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 (journal version)

  20. Cyclic covering morphisms on $\overline{M}_{0,n}$ (with an appendix by Anand Deopurkar, 2013); an older version on arXiv:1105.0655

  21. Alternate compactifications of moduli spaces of curves (joint with David Smyth) on arXiv:1012.0329
    in Handbook of Moduli: Volume I, 331-414, editors Gavril Farkas and Ian Morrison, Adv. Lect. Math. (ALM), 24, Int. Press, Somerville, MA, 2013

  22. Moduli spaces of weighted stable curves and log canonical models of M_{g,n}
    Math. Res. Lett., 18 (2011) no. 4, 663-675 (journal version)

  23. Ample divisors on moduli spaces of pointed rational curves (joint with David Smyth)
    J. Algebraic Geom., 20 (2011) no. 4, 599-629 (journal version)

  24. Severi varieties and the moduli space of curves (Harvard dissertation) on arXiv:0710.1623

  25. Rigidity and polynomial invariants of convex polytopes (joint with Igor Pak)
    Duke Math. J., 129 (2005), no. 2, 371-404 (journal version)

Last modified: Thu Jul 5 13:00:50 EDT 2018