Publications and Preprints


    1. The period-index problem for hyperkaehler manifolds. 37 pages. submitted arXiv:2411.17604

    2. (with D. Mattei) The special Brauer group and twisted Picard varieties. 26 pages. submitted arXiv:2310.04032

    3. (with D. Mattei) Splitting unramified Brauer classes by abelian torsors and the period-index problem. 19 pages. to appear in Math. Ann. arXiv:2310.04029

    4. The K3 category of a cubic fourfold - an update. Beitraege zur Algebra und Geometrie arXiv:2303.03820

    5. Chow groups of surfaces of lines in cubic fourfolds. 15 pages. arXiv:2211.12186 EpiGA (2023) Art 5

    6. (with O. Debarre, E. Macri, C. Voisin) Computing Riemann--Roch polynomials and classifying hyper-Kaehler fourfolds. JAMS 37, (2024), 151-185. arXiv:2201.08152

    7. (with T. Beckmann) Dual fibrations. 19 pages. not submitted pdf

    8. (with F. Anella) Characteristic foliations. Bull. LMS 56, (2024), 2231-2249 arXiv:2201.07624

    9. (with an appendix by J. Ottem) Nodal quintic surfaces and lines on cubic fourfolds. 27 pages. L'Enseignement mathematique 70 (2024), 499-532. arXiv:2108.10532

    10. (with M. Mauri) On type II degenerations of hyperkaehler manifolds. Math. Res. Lett. 30 (2023), no. 1, 125-141 arXiv:2108.01587

    11. (with M. Mauri) Lagrangian fibrations. Milan Journal Math. 90 (2022), 459-483. arXiv:2108.10193

    12. (with F. Anella) Effectivity of semipositive line bundles pdf Milan Journal Math. 9 (2022), 389-401

    13. (with Y. Dutta) Maximal variation of curves on K3 surfaces. 19 pages. Tunisian J. Math. 4 (2022), 443-464 arXiv:2105.04787

    14. Brilliant families of K3 surfaces: Twistor spaces, Brauer groups, and Noether-Lefschetz loci. Ann. Fac. Sci. Toulouse Math. (6) 32 (2023), no. 2, 397-421 arXiv:2012.04608

    15. Geometry of K3 surfaces and hyperkaehler manifolds. Plenary talk at the DMV annual meeting 2020. 18 pages. not submitted pdf

    16. Complex multiplication in twistor spaces. 22 pages. IMRN 2022, 3 (2022), 2095-2122. arXiv:1910.13788

    17. (with Chenyang Xu) Lagrangian fibrations of hyperkaehler fourfolds. Journal IJM 21 (2022), 921-932 arXiv:1902.10440

    18. Hodge theory of cubic fourfolds, their Fano varieties, and associated K3 categories. in Lecture Notes of the Unione Matematica Italiana 26, Springer, (2019), 165-198. arXiv:1811.02876

    19. Finiteness of polarized K3 surfaces and hyperkaehler manifolds. Annales Henri Lebesgue 1 (2018) 227-246. arXiv:1801.07040

    20. Motives of isogenous K3 surfaces. 12 pages. Commentarii Mathematici Helvetici 94 (2019), 445-458. arXiv:1705.04063

    21. Motives of derived equivalent K3 surfaces. Abhandlungen aus dem Mathematischen Seminar der Universitaet Hamburg 88 (2018), 201-207. arXiv:1702.03178

    22. (with J. Rennemo) Hochschild cohomology versus the Jacobian ring, and the Torelli theorem for cubic fourfolds. Algebraic Geometry 6(1) (2019), 76-99 arXiv:1610.04128

    23. The K3 category of a cubic fourfold. Compositio Mathematica 153 (2017), 586-620 arXiv:1505.01775

    24. On derived categories of K3 surfaces, symplectic automorphisms, and the Conway group. 16 pages. Advanced Studies in Pure Math. 69 (Math. Soc. Japan) 2016 arXiv:1309.6528

    25. (with an appendix by C. Voisin) Curves and cycles on K3 surfaces. Algebraic Geometry 1 (2014), 69-106. arXiv:1303.4564

    26. Symplectic automorphisms of K3 surfaces of arbitrary order. Math. Res. Lett. 19 (2012), 947-951. arXiv:1205.3433v1

    27. (with M. Kemeny) Stable maps and Chow groups. Documenta mathematica 18 (2013), 507-517. arXiv:1202.4968

    28. Introduction to stability conditions. in 'Moduli Spaces' Cambridge University Press edited by Brambila Paz, Newstead, Thomas and Garcia-Prada Lectures at the Newton Institute January 2011. videos 47 pages. arXiv:1111.1745v1

    29. A Global Torelli theorem for hyperkähler manifolds (after Verbitsky). Seminaire Bourbaki Exp. No. 1040 Juin 2011 Astérisque No. 348 (2012), 375-403. arxiv:1106.5573

    30. Stability conditions via spherical objects. Math. Z. 271 (2012), no. 3-4, 1253-1270. arXiv:1009.4372

    31. A note on the Bloch-Beilinson conjecture for K3 surfaces and spherical objects. Pure Appl. Math. Q. 7 (2011), no. 4, Special Issue: In memory of Eckart Viehweg, 1395-1405 arXiv:1009.4371

    32. Hyperkähler manifolds and sheaves. Proceedings of the International Congress of Mathematicians. Volume II,450-460. pdf-file

    33. Chow groups and derived categories of K3 surfaces. 16 pages. Current developments in algebraic geometry, 177-195, Math. Sci. Res. Inst. Publ., 59. arXiv:0912.5299v1

    34. (with E. Macri, P. Stellari) Formal deformations and their categorical general fibre. Comment. Math. Helv. 86 (2011), 41-71 This is Part one of arXiv:0710.1645v2. arXiv:0809.3201v1

    35. (with E. Macri, P. Stellari) Derived equivalences of K3 surfaces and orientation. Duke Math. J. 149 (2009), 461-507. This is Part two of arXiv:0710.1645v2. arXiv:0710.1645v3

    36. Chow groups of K3 surfaces and spherical objects. Journal EMS 12 (2010), 1533-1551. arXiv:0809.2606v1

    37. (with R. Thomas) Deformation-obstruction theory for complexes via Atiyah and Kodaira-Spencer classes. Math. Ann. 346 (2010), 545-569. arXiv:0805.3527v1

    38. (with M. Nieper-Wisskirchen) Remarks on derived equivalences of Ricci-flat manifolds. Math. Zeit. 267 (2011), 939-963. arXiv:0801.4747.

    39. (with E. Macri, P. Stellari) Derived equivalences of K3 surfaces and orientation. 70 pages. arXiv:0710.1645v2

    40. (with E. Macri, P. Stellari) Stability conditions for generic K3 categories. 32 pages. Comp. math. 144 (2008), 134-162. math.AG/0608430

    41. Derived and abelian equivalence of K3 surface. J. Alg. Geom. 17 (2008), 375-400. math.AG/0604150

    42. The global Torelli theorem: classical, derived, twisted. Algebraic geometry-Seattle 2005. Part 1, 235-258, Proc. Sympos. Pure Math., 80, Part 1, Amer. Math. Soc., Providence, RI, 2009. arXiv:math/0609017v1 (2006). published version slightly different.

    43. (with R. Thomas) P-objects and autoequivalences of derived categories. MRL 13 (2006), 87-98. math.AG/0507040

    44. Projectivity of Kähler manifolds - Kodaira's problem (after C. Voisin) Astérisque No. 311 (2007), Exp. No. 954, vii, 55-73. Seminaire Bourbaki math.AG/0512039

    45. (with P. Stellari) Proof of Caldararu's conjecture. Adv. Stud. Pure Math. 45. 'Moduli spaces and arithmetic of algebraic varieties.' (2007), 31-42. math.AG/0411541

    46. (with P. Stellari) Equivalences of twisted K3 surfaces. Math. Ann. 332 (2005), 901-936. math.AG/0409030

    47. Generalized Calabi-Yau structures, K3 surfaces, and B-fields. Int. J. Math. 16 (2005), 13-36. math.AG/0306162

    48. (with S. Schroeer) The Brauer group of analytic K3 surfaces. IMRN. 50 (2003), 2687-2698. math.AG/0305101

    49. Moduli spaces of hyperkähler manifolds and mirror symmetry. Intersection theory and moduli, 185-247 (electronic), ICTP Lect. Notes, XIX, Abdus Salam Int. Cent. Theoret. Phys., Trieste, 2004. math.AG/0210219

    50.  Finitenes results for hyperkähler manifolds. J. reine angew. Math. 558 (2003), 15-22. math.AG/0109024

    51. The Kähler cone of a compact hyperkähler manifold. completely revised version of the 1999 preprint.Math. Ann. 326 (2003), 499-513. math.AG/9909109

    52. Erratum to the paper: Compact hyperkähler manifolds: basic results. Invent. math. 152 (2003), 209-212. math.AG/0106014

    53. Product of harmonic forms and rational curves. Documenta Mathematica 6 (2001), 227-239. math/0003202

    54. Compact hyperkähler manifolds: Basic results. Invent. Math. 135 (1999), 63-113. alg-geom/9705025

    55. Compact hyperkähler manifolds. Habilitationsschrift Essen (1997), 65 pages ( ps-file )

    56. Birational symplectic manifolds and their deformations. J. Diff. Geom. 45 (1997), 488-513. alg-geom/9601015

    57. (with L. Göttsche) - Hodge numbers of moduli spaces of stable sheaves on K3 surfaces. Int. J. Math. 7 (1996), 359-372. alg-geom/9408001

    58. The tangent bundle of a Calabi-Yau manifold - Deformations and restrictions to rational curves. Comm. Math. Phys. 171 (1995), 139-158. ( ps-file )

    59. (with M. Lehn) Framed modules and their moduli. Int. J. Math. 6 (1995), 297-324. ( ps-file )

    60. (with M. Lehn) Stable pairs on curves and surfaces. J. Alg. Geom. 4 (1995), 67-104. alg-geom/921100

    61. Complete Curves in moduli spaces of stable bundles on surfaces. Math. Ann. 298 (1994), 67-78.