S. Heefer

activity

20192026

most citedWhite Paper and Roadmap for Quantum Gravity Phenomenology in the Multi-Messenger Era

52 citations · 171 across the 15 of their papers we have counts for

collaborators

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4 papers · 1 filter

math.DG2024★ 4 cited

Berwald $m$ -Kropina Spaces of Arbitrary Signature: Metrizability and Ricci-Flatness

Sjors Heefer

The (pseudo-)Riemann-metrizability and Ricci-flatness of Finsler spaces with $m$ -Kropina metric $F = α^{1 + m} β^{- m}$ of Berwald type are investigated. We prove that the affine conne…

math.DG2022★ 7 cited

On the metrizability of $m$ -Kropina spaces with closed null 1-form

Sjors Heefer, Christian Pfeifer, Jorn van Voorthuizen +1

We investigate the local metrizability of Finsler spaces with $m$ -Kropina metric $F = α^{1 + m} β^{- m}$ , where $β$ is a closed null 1-form. We show that such a space is of Berwald typ…

math.DG2020★ 20 cited

On the non metrizability of Berwald Finsler spacetimes

Andrea Fuster, Sjors Heefer, Christian Pfeifer +1

We investigate whether Szabo's metrizability theorem can be extended to Finsler spaces of indefinite signature. For smooth, positive definite Finsler metrics, this important theore…

math.DG2019★ 12 cited

Identifying Berwald Finsler Geometries

Christian Pfeifer, Sjors Heefer, Andrea Fuster

Berwald geometries are Finsler geometries close to (pseudo)-Riemannian geometries. We establish a simple first order partial differential equation as necessary and sufficient condi…

Berwald m-Kropina Spaces of Arbitrary Signature: Metrizability and Ricci-Flatness

On the metrizability of m-Kropina spaces with closed null 1-form

On the non metrizability of Berwald Finsler spacetimes

Identifying Berwald Finsler Geometries

Berwald $m$ -Kropina Spaces of Arbitrary Signature: Metrizability and Ricci-Flatness

On the metrizability of $m$ -Kropina spaces with closed null 1-form