Research

Upcoming Talks:

  1. UCSB Topology Seminar, April 2, 2019

Pre-prints:

  1. The Essential Dimension of Congruence Covers (with Benson Farb and Mark Kisin). Submitted for publication.
  2. Resolvent degree, Hilbert’s 13th Problem and Geometry (with Benson Farb). Submitted for publication.
  3. Derived \ell-adic zeta functions (with Jonathan Campbell and Inna Zakharevich). Submitted for publication.
  4. Coincidences of homological densities, predicted by arithmetic (with Benson Farb and Melanie Matchett Wood). Submitted for publication.
  5. A Generalized Contou-Carrere Symbol and its Reciprocity Laws in Higher Dimensions (with Oliver Braunling and Michael Groechenig). Submitted for publication.

Publications:

  1. Hochschild coniveau spectral sequence and the Beilinson residue (with Oliver Braunling). Pacific Journal of Mathematics, to appear.
  2. The A_\infty-Structure of the Index Map (with Oliver Braunling and Michael Groechenig). Annals of K-Theory, vol. 3, no. 4, 2018, 581–614.
  3. Etale homological stability and arithmetic statistics (with Benson Farb). Quarterly Journal of Mathematics, vol. 69, no. 3, 2018, pp. 951–974.
  4. On the normally ordered tensor product and duality for Tate objects (with Oliver Braunling, Michael Groechenig and Aron Heleodoro). Theory and Applications of Categories, vol. 33, 2018, pp. 296-349.
  5. The Index Map in Algebraic K-Theory (with Oliver Braunling and Michael Groechenig). Selecta Mathematica, vol. 24, no. 2, 2018, pp. 1039-1091.
  6. Topology and arithmetic of resultants, II: the resultant = 1 hypersurface (with an appendix by C. Cazanave) (with Benson Farb). Algebraic Geometry, vol. 4, no. 3, 2017, pp. 337-352.
  7. Relative Tate Objects and Boundary Maps in the K-Theory of Coherent Sheaves (with Oliver Braunling and Michael Groechenig). Homology, Homotopy and Applications, vol. 19, no. 1, 2017, pp. 341-369.
  8. Modular Operads of Embedded Curves (with Satoshi Kondo and Charles Siegel). Geometry & Topology, vol. 21, no. 2, 2017, pp. 903-922.
  9. Operator Ideals in Tate Objects (with Oliver Braunling and Michael Groechenig). Mathematical Research Letters, vol. 23, no. 6, 2016, pp. 1565-1631.
  10. Coincidences of homological densities, predicted by arithmetic (with Benson Farb and Melanie Wood). “Topologie”, Oberwolfach Research Reports, vol. 16, no. 3, 2016, pp. 2041-2043.
  11. Geometric and Analytic Structures on the Higher Adeles (with Oliver Braunling and Michael Groechenig). Research in the Mathematical Sciences, Special Collection in Celebration of the Research of Fedor Bogomolov on the Occasion of his 70th Birthday, vol. 3, no. 1, 2016, article 22.
  12. Topology and arithmetic of resultants, I (with Benson Farb). New York Journal of Mathematics, vol. 22, 2016, pp. 801-821
  13. Tate Objects in Exact Categories (with an appendix by J. Stovicek and J. Trlifaj)  (with Oliver Braunling and Michael Groechenig). Moscow Mathematical Journal, vol. 16, no. 3, 2016, pp. 433-504.
  14. Descent for n-Bundles. Advances in Mathematics, vol. 288, 2016, pp. 527-575.

In Preparation:

  1. Group Extensions and the Tate Tame Symbol on K_3 (with Jens Kaad and Ryszard Nest)
  2. Tschirnhaus Transformations, after Hilbert (with Benson Farb)
  3. Essential Dimension of Congruence Covers II (with Benson Farb and Mark Kisin)
  4. Derived motivic integration (with Oliver Braunling, Michael Groechenig and Inna Zakharevich)

Research Talks:

  1. IPAM – Braids, Polynomials and Hilbert’s 13th Problem, Feb. 19-21, 2019
    1. After Abel, Feb. 19, 2019
    2. Resolvent Degree and Classical Solutions, Feb. 19, 2019
    3. Resolvent Degree and the Search for Lower Bounds, Feb. 21, 2019
  2. Tufts Colloquium – Braids, Polynomials and Hilbert’s 13th Problem, Feb. 1, 2019.
  3. Michigan Topology Seminar – Topological Invariants of Algebraic Functions, Jan. 10, 2019.
  4. UCR Topology Seminar – The Geometry of Hilbert’s 13th Problem, Nov. 8, 2018
  5. USC Colloquium – Braids, Polynomials and Hilbert’s 13th Problem, Sept. 26, 2018
  6. Michigan Representation Stability Conference, Aug. 13-17, 2018
  7. UCI Algebra Seminar – The Geometry of Hilbert’s 13th Problem, May 30, 2018
  8. Stanford Topology Seminar – The Theory of Resolvent Degree, after Hamilton, Klein, Sylvester, Hilbert and Brauer, May 22, 2018
  9. UCLA Algebra Seminar – The Theory of Resolvent Degree, after Hamilton, Klein, Sylvester, Hilbert and Brauer, May 18, 2018
  10. Caltech Algebra & Geometry Seminar – The Theory of Resolvent Degree, after Hamilton, Klein, Sylvester, Hilbert and Brauer, May 14, 2018
  11. CCR – The Theory of Resolvent Degree, after Hamilton, Klein, Sylvester, Hilbert and Brauer, April 26, 2018
  12. USC Tuesday Seminar  – The Geometry of Hilbert’s 13th Problem, April 24, 2018
  13. USC Algebra Seminar – The Theory of Resolvent Degree, after Hamilton, Klein, Sylvester, Hilbert and Brauer, April 23, 2018
  14. UChicago Colloquium – Braids, Polynomials and Hilbert’s 13th Problem, April 11, 2018
  15. Harvard Number Theory Seminar – The Theory of Resolvent Degree, after Hamilton, Klein, Hilbert and Brauer, March 7, 2018
  16. Harvard Informal Geometry and Dynamics Seminar – The Geometry of Hilbert’s 13th Problem, March 7, 2018
  17. UC Irvine Colloquium – Braids, Polynomials and Hilbert’s 13th Problem, March 1, 2018
  18. Kempner Colloquium – Algebraic Topology and Hilbert’s 13th Problem(s), Boulder, CO, Jan. 30, 2018
  19. Boulder Topology Seminar – Coincidences of homological densities, predicted by arithmetic, Boulder, CO, Jan. 30, 2018
  20. Oberwolfach  Workshop “Topology of Arrangements and Representation Stability” – The theory of resolvent degree, after Hamilton, Sylvester, Hilbert, Segre and Brauer, Oberwolfach, Germany, Jan. 14-20, 2018
  21. UMN Topology Seminar -The theory of resolvent degree, after Hamilton, Sylvester, Hilbert, Segre and Brauer – Twin Cities, MN, Dec. 8, 2017
  22. UCSD Number Theory Seminar – The theory of resolvent degree, after Hamilton, Sylvester, Hilbert, Segre and Brauer – San Diego, USA, Nov. 30, 2017
  23. UBC Topology Seminar – Coincidences of homological densities, predicted by arithmetic – Vancouver, Canada, Nov. 8, 2017
  24. UBC Algebraic Geometry Seminar – The theory of resolvent degree, after Hamilton, Sylvester, Hilbert, Segre and Brauer – Vancouver, Canada, Nov. 6, 2017
  25. No Boundaries – Groups in Algebra, Geometry and Topology – The theory of resolvent degree, after Hamilton, Sylvester, Hilbert, Segre and Brauer – Chicago, USA, Oct. 26-29, 2017
  26. Manifolds and Groups – Coincidences of homological densities, predicted by arithmetic – Regensburg, Germany, Sept. 25-29, 2017
  27. UCLA Number Theory Seminar – Coincidences of homological densities, predicted by arithmetic – Jan. 25, 2017
  28. UCI Number Theory Seminar – Coincidences of homological densities, predicted by arithmetic – Jan. 23, 2017
  29. Notre Dame Topology Seminar – Coincidences of homological densities, predicted by arithmetic – Dec. 8, 2016
  30. University of Chicago Geometry/Topology Seminar – Coincidences of homological densities, predicted by arithmetic – Sept. 29, 2016
  31. 2016 Oberwolfach Topology Meeting – Coincidences of homological densities, predicted by arithmetic – July 21, 2016
  32. 27th Nordic Congress of Mathematicians, Geometry and Topology Session – Counting Problems and Homological Stability – March 17, 2016
  33. Purdue Topology Seminar – Counting Problems and Homological Stability – March 2, 2016
  34. Wayne State Colloquium – Polynomials, Counting Problems and Algebraic Topology – February 22, 2016
  35. IBS-CGP Conference on Homotopical Methods in Quantum Field Theory – Higher Determinants and Double Loop Groups – January 13, 2016
  36. Minnesota Topology Seminar – Counting Problems and Homological Stability – October 26, 2015
  37. Rice Topology Seminar – Counting Problems and Homological Stability – October 19, 2015
  38. Northwestern Topology Seminar – Counting Problems and Homological Stability – October 12, 2015
  39. 2015 AMS Summer Institute in Algebraic Geometry – Topology and Arithmetic of Resultants – July 27, 2015
  40. Midwest Topology Seminar – Topology and Arithmetic of Spaces of Rational Maps – May 10, 2015
  41. Wisconsin Number Theory Seminar – Geometry and Arithmetic of Spaces of Rational Maps – May 7, 2015
  42. UIC Homotopy Algebras Seminar – Modular Operads of Embedded Curves – April 17, 2015
  43. 2015 Arkansas Spring Lecture Series – Spaces of Rational Functions, Representation Stability, and Statistics over Finite Fields – March 5, 2015
  44. Rutgers Algebra Seminar – The Index Map and Reciprocity Laws for Contou-Carrere Symbols – Feb. 4, 2015
  45. Yale Geometry, Symmetry and Physics Seminar – The Index Map and Reciprocity Laws for Contou-Carrere Symbols – Feb. 2, 2015
  46. MIT – Topology Seminar – The Index Map and Reciprocity Laws – Nov. 17, 2014
  47. University of Tokyo – Topology Seminar – The Index Map and Reciprocity Laws for Contou-Carrere Symbols – July 22, 2014
  48. IPMU – Get Together Seminar – A Modular Operad of Embedded Curves – July 3, 2014
  49. Imperial College London MAGIC Seminar – Index Theory and Reciprocity Laws – February 26, 2014
  50. Padua Winter School and Workshop on Higher Structures in Algebraic Analysis – The Index Map in Algebraic K-Theory – February 18, 2014
  51. University of Copenhagen Algebra/Topology Seminar – Index Theory and Reciprocity Laws – December 17, 2013
  52. Nagoya University K-Theory Seminar – Index Theory in Algebraic K-Theory -December 12, 2013
  53. Chuo University – K-Theory Seminar – Index Theory in Algebraic K-Theory – December 3, 2013
  54. IPMU – Get-Together Math Seminar – Index Theory in Algebraic K-Theory and Algebraic Geometry – October 10, 2013
  55. Northwestern Mini-Conference – Determinants, Delooping and Reciprocity – June 12, 2013
  56. Northwestern – Topology Seminar – Descent for n-Bundles – June 3, 2013
  57. Paris – Institute de Mathematiques de Jussieu – Seminaire d’Analyse Algebrique – Descent for n-Bundles – May 21, 2013
  58. Utrecht – Descent for n-Bundles – May 17, 2013
  59. Oxford – Algebraic and Symplectic Geometry Seminar – Descent for n-Bundles – May 7, 2013
  60. EPFL – Topology Seminar – Determinants and Delooping of Algebraic K-Theory – May 3, 2013
  61. EPFL – Geometry Seminar – Determinants, Delooping and Reciprocity – May 1, 2013
  62. Max Planck Institute for Mathematics – Higher Differential Geometry Seminar – “Descent for n-bundles” – April 24, 2013
  63. University of British Columbia – Algebraic Geometry Seminar – “Strictifying Higher Bundles” – Oct. 29, 2012
  64. Notre Dame – Topology Seminar – “Extensions of Lie n-Groups”  – Sept. 27, 2012
  65. 2012 ESI Program on K-Theory and Quantum Fields – “Extensions of Lie n-Groupoids by Strict Lie n-Groups” – June 14, 2012

Other Talks:

  1. IPMU Special Seminar – Nerves and Group Completion for Categories and Operads, A Beginner’s Guide, Parts 1-3 – Aug. 29, Sept. 1 and Sept. 2, 2014
  2. IPMU Conformal Blocks Seminar – Loop Groups and Conformal Blocks – Nov. 19, 2013
  3. MIT Babytop – The Structure of Higher Bundles – Nov. 27, 2012
  4. 2012 Simons Center Graduate Workshop on SUSY Field Theories  – Supermanifolds – March 6, 2012
  5. 2011 Talbot Workshop – Principal Bundles, Real Structures, Toledo Invariant and Milnor-Wood – May 2, 2011
  6. Northwestern Graduate Seminar – The Chern-Weil Construction – April 21, 2011
  7. Northwestern Graduate Seminar – Symmetries of Spaces and Bundles – Jan. 20, 2011
  8. Northwestern Graduate Seminar – Spin Structures – Oct. 7, 2010
  9. Discrete and Continuous Geometries, Northwestern Conference for Undergraduates – The Euler Characteristic – June 23, 2010
  10. 2010 Talbot Workshop – Complex K-Theory – May 23, 2010
  11. Northwestern Graduate Seminar – Introduction to Complex K-Theory – May 18, 2010

Posters:

  1. Newton Institute’s Higher Structure 2013: Operads and Deformation Theory – “Mapping Spaces in Higher Stacks, and Applications” – April 2, 2013