J. Nienhaus,
An improved four-periodicity theorem and a conjecture of Hopf with symmetry,
Duke Math. Journal (to appear), arXiv:2211.13151
K. Broder, J. Nienhaus, P. Petersen, J. Stanfield and M. Wink,
Vanishing theorems for Hodge numbers and the Calabi curvature operator,
Advances in Mathematics (2026), arXiv:2503.06870
J. Nienhaus and M. Wink,
Einstein metrics on the Ten-Sphere,
J. Eur. Math. Soc. (2025), arXiv:2303.04832
J. Nienhaus and M. Wink,
New expanding Ricci solitons starting in dimension four,
J. Geom. Anal 34, 327 (2024), arXiv:2307.16683
J. Nienhaus, P. Petersen and M. Wink,
Betti numbers and the curvature operator of the second kind,
J. Lond. Math. Soc., (2023) arXiv:2206.14218
J. Nienhaus, P. Petersen, M. Wink and W. Wylie,
Holonomy restrictions from the curvature operator of the second kind,
Differential Geom. Appl. 88 (2023), no. 9, 102010, arXiv:2208.13820
J. Nienhaus and D. Wulle,
Fixed Point Homogeneous Orbifolds with Positive Sectional Curvature (2026)
H. El-Hasan, X. Li, J. Nienhaus, P. Petersen and M. Wink
A characterisation of complex projective space via the Calabi operator (2026)
L. Kennard, L. Mouillé, J. Nienhaus
On Hopf's conjecture and positive second intermediate Ricci curvature (2025)
PhD Thesis: An improved Four-periodicity Theorem and a Conjecture of Hopf with Symmetry (2022, paper version available at arXiv:2211.13151)
MSc Thesis: Spaces with partially periodic cohomology rings (2018)
(both at the University of Münster, advised by B. Wilking)