GeomGravX: 10 Years of Geometric Foundations of Gravity and eXtensions (in Tartu)

Session

Tuesday Parallel B1

30 Jun 2026, 13:30

A106 (Physicum, University of Tartu)

98. Sebastian Brezina: The teleparallel gravity and Noether's second theorem

30/06/2026, 13:30

It is well known that the Teleparallel Equivalent of General Relativity (TEGR) is locally dynamically equivalent to General Relativity in the absence of matter. However, for decades, discussions have persisted about this equivalence when matter is present. These discussions primarily focus on the choice of coupling prescription, whether to use the metric teleparallel or the Levi-Civita one,...

99. Carmen Ferrara: Primary constraints of newer general relativity

30/06/2026, 13:55

1

We study the primary constraint structure of newer general relativity, a gravity theory based on a torsionless teleparallel geometry. The gravitational action consists of a scalar built from quadratic combinations of the nonmetricity tensor with arbitrary coefficients in the Lagrangian. We perform a 3+1 decomposition of the Lagrangian and compute the canonical momenta associated with the...

100. Dario Sauro: 3+1 decomposition and Hamiltonian analyses in symmetric teleparallel theories

30/06/2026, 14:20

We perform a 3+1 decomposition in a general symmetric metric-affine theory, classifying the extrinsic tensors and deriving the generalized Gauss-Codazzi relations. The latter are exploited to perform the teleparallel limit in a model-independent fashion, thus identifying the extrinsic non-metricity tensor which plays the role of the extrinsic Riemannian curvature. We further prove that no...

101. Lehel Csillag: On the inverse problem of calculus of variations for autoparallels

30/06/2026, 14:45

In metric–affine geometry, autoparallels are generically non-variational, i.e.\,, they are not the extremals of any action integral. The existence of a parametrization-invariant action principle for autoparallels is a long-standing open problem, which is equivalent to the so-called Finsler metrizability of the connection -- that is, to the fact that these autoparallels can be interpreted as...

120. Joakim Flinckman: Gravity beyond a single metric: Ghost-free interactions of spin-2 fields

30/06/2026, 15:10

The fundamental interactions of nature are formulated in terms of fields classified by mass and spin. Two of the most successful theories, General Relativity (GR) and the Standard Model (SM), can be derived from fields of fixed mass and spin by imposing theoretical consistency conditions. The SM contains well-understood interactions for fields with spin s<2, whereas local interacting theories...