Carl Tipler

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Research interests :
  • Differential geometry : canonical Kähler metrics, perturbative techniques, moment maps.
  • Complex algebraic geometry : K-stability, slope stability, GIT, deformation theory, toric varieties.
  • Mathematical physics : Yang-Mills connections, Calabi-Yau varieties, Hull-Strominger system.

Research Papers

  1. "Polynomial stability conditions for vector bundles: Positivity, equivariance and blow-ups",
    with Rémi Delloque, Achim Napame and Carlo Scarpa,
    ArXiv 2506.23842

  2. "Foldable fans, cscK surfaces and local K-moduli",
    to appear in Moduli (Foundation Compositio Mathematica).
    ArXiv 2402.01159

  3. "Toric sheaves and flips",
    with A. Clarke and A. Napame, Épijournal de Géom. Algébr., EPIGA 9, Paper No. 8, 20p. (2025). Journal.
    ArXiv 2309.09267

  4. "On the Futaki invariant of Fano threefolds",
    with Lars Martin Sektnan, Ann. Univ. Ferrara 70, 811–837 (2024). Journal.
    ArXiv 2307.02258

  5. "Semi-stability and local wall-crossing for hermitian Yang-Mills connections",
    with Andrew Clarke, J. Symplectic Geom. 22, No. 3, 673-694 (2024). Journal.
    ArXiv 2304.05245. Video

  6. "A note on stable toric sheaves of low rank",
    Transformation Groups (2024). Journal.
    Arxiv 2307.02822

  7. "Blowing-up Hermitian Yang--Mills connections",
    with Andrew Clarke, to appear in Annali della Scuola Normale Superiore di Pisa (2025). Journal.
    ArXiv 2301.00525

  8. "Analytic K-semistability and local wall-crossing",
    with Lars Martin Sektnan, Ann. Glob. Anal. Geom. 68, 8 (2025). Journal.
    ArXiv 2212.08383

  9. "Toric sheaves, stability and fibrations",
    with Achim Napame, J. Pure Appl. Algebra 228, No. 3, Article ID 107494, 30 p. (2024). Journal.
    ArXiv 2210.04587

  10. "Hermitian Yang-Mills connections on pullback bundles",
    with Lars Martin Sektnan, Calc. Var. Partial Differ. Equ. 63, Paper No. 13, 63p. (2024). Journal.
    ArXiv 2006.06453

  11. "T-dual solutions and infinitesimal moduli of the G2-Strominger system",
    with A. Clarke and M. Garcia-Fernandez, Adv. Theor. Math. Phys., vol.26, no.6, 1669-1704, 2022. Journal.
    ArXiv 2005.09977

  12. "The Zariski-Lipman conjecture for toric varieties",
    J. Algebra, 609 (2022), pp. 547-551. Journal.
    ArXiv 2202.02109

  13. "Gauge theory for string algebroids",
    with Mario Garcia-Fernandez and Roberto Rubio, J. Differential Geom. 128(1): 77-152 (2024). Journal.
    ArXiv 2004.11399

  14. "Canonical metrics on holomorphic Courant algebroids",
    with M. Garcia-Fernandez, R. Rubio and C. Shahbazi, Proc. London Math. Soc., 125: 700-758 (2022). Journal.
    ArXiv 1803.01873

  15. "Equivariant stable sheaves and toric GIT",
    with Andrew Clarke, Proc. R. Soc. Edinb., Sect. A, Math., 153(2), 385-416 (2023). Journal.
    ArXiv 2001.01500

  16. "Relative Chow stability and optimal weights",
    Proc. Amer. Math. Soc., vol. 151, no. 9 (2023), 4015-4026. Journal.
    ArXiv 1710.02536

  17. "A moment map picture of relative balanced metrics on extremal Kähler manifolds",
    with Yuji Sano, J. Geom. Anal. 31 (2021), 5941-5973. Journal.
    ArXiv 1703.09458

  18. "Holomorphic string algebroids",
    with Mario Garcia-Fernandez and Roberto Rubio, Trans. Amer. Math. Soc. 373 (2020), 7347-7382. Journal.
    ArXiv 1807.10329

  19. "The Lie group of automorphisms of a Courant algebroid and the moduli space of generalized metrics",
    with Roberto Rubio, Rev. Mat. Iberoam. 36 (2020), 485--536. Journal.
    ArXiv 1612.03755

  20. "Infinitesimal moduli for the Strominger system and Killing spinors in generalized geometry"
    with Mario Garcia-Fernandez and Roberto Rubio, Math. Ann. (2017) 369: 539--595. Journal.
    ArXiv 1503.07562

  21. "Extremal metrics and lower bound of the modified K-energy"
    with Yuji Sano, J. Eur. Math. Soc. (JEMS) 17 (2015), no. 9, 2289-2310. Journal.
    ArXiv 1211.5585

  22. "Deformations of constant scalar curvature Sasakian metrics and K-stability"
    with Craig Van Coevering, Int. Math. Res. Not. IMRN 2015, no. 22, 11566-11604. Journal.
    ArXiv 1312.3686

  23. "Lower bounds on the modified K-energy and complex deformations"
    with Andrew Clarke, Adv. Math. 252 (2014), 449–470. Journal.
    ArXiv 1302.0556

  24. "Deformations of complex structures and the coupled Kähler-Yang-Mills equations"
    with Mario Garcia-Fernandez, J. London Math. Soc. 89 (2014) 779-796. Journal.
    ArXiv 1301.4480

  25. "Deformations of extremal toric manifolds"
    with Yann Rollin, J. Geom. Anal. 24 (2014), no. 4, 1929-1958. Journal.
    ArXiv 1201.4137

  26. "A note on blow-ups of toric surfaces and CSC Kähler metrics"
    Tohoku Math. J. (2) Vol. 66, No. 1 (2014), 15-29. Journal.
    ArXiv 1203.0854

  27. "Deformation of extremal metrics, complex manifolds and the relative Futaki invariant"
    with Yann Rollin and Santiago Simanca, Math. Z. 273 (2013), no. 1-2, 547-568. Journal.
    ArXiv 1107.0456

  28. "Extremal Kähler metrics on blow-ups of parabolic ruled surfaces":
    Bulletin de la SMF 141, fascicule 3 (2013), 481-516. Journal.
    ArXiv 1104.4315

Thesis

  • "Métriques extrémales et système de Strominger", Habilitation. pdf (in french)
  • "Constructions de Métriques extrémales, résolutions de singularités et déformations complexes", Thesis supervised by Yann Rollin at laboratoire de mathématiques Jean Leray de Nantes. pdf (in french)

Phd Students

  • Remi Delloque (2023-....) : "Perturbative techniques for geometric PDEs with moment map pictures".
  • Achim Napame (2020-2023) : "Equivariant stable sheaves on toric varieties".