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Joseph Helfer

    20162026

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    • INTERNAL 1-TOPOI IN 2-TOPOI To M. Makkai

      Helfer, J., 2026, In: Theory and Applications of Categories. 45, p. 779-862 84 p.

      Research output: Contribution to journal › Article › peer-review

    • Exotic tight contact structures on Rn

      Fauteux-Chapleau, F. S. & Helfer, J., 2025, In: Journal of Symplectic Geometry. 23, 1, p. 227-283 57 p.

      Research output: Contribution to journal › Article › peer-review

    • Severi Curves of Rational Elliptic Surfaces

      Greer, F., Helfer, J. & Sheridan, J., Oct 1 2025, In: International Mathematics Research Notices. 2025, 20, rnaf318.

      Research output: Contribution to journal › Article › peer-review

    • First-order homotopical logic

      Helfer, J., 2023, (Accepted/In press) In: Journal of Symbolic Logic.

      Research output: Contribution to journal › Article › peer-review

      Open Access

    • Homotopies in grothendieck fibrations

      Helfer, J., 2020, In: Theory and Applications of Categories. 35, p. 1312-1378 67 p.

      Research output: Contribution to journal › Article › peer-review

      2 Scopus citations
    View all 7 Research outputs