428 citations · 495 across the 13 of their papers we have counts for
13 papers
On the "Legendre scalarization" of nonlinear gravity theories
Guido Magnano
We discuss the proposal of a new method to transform a f(R) metric gravity theory into a general relativistic theory including an auxiliary scalar field, recently introduced by S.…
On the Generalised Equipartition Law
Guido Magnano, Beniamino Valsesia
We observe that the so-called Generalised Equipartition Law for hamiltonian systems is actually valid only under specific hypotheses -- unfortunately omitted in some textbooks -- w…
New Separation of Variables for the Classical XXX and XXZ Heisenberg Spin Chains
Guido Magnano, Taras Skrypnyk
We propose a non-standard separation of variables for the classical integrable XXX and XXZ spin chains with degenerate twist matrix. We show that for the case of such twist matrice…
Test-field limit of metric nonlinear gravity theories
Guido Magnano, Krzysztof A. Meissner, Leszek M. SokoŁOwski
In the framework of alternative metric gravity theories, it has been shown by several authors that a generic Lagrangian depending on the Riemann tensor describes a theory with 8 de…
Constraining the Physical State by Symmetries
L. Fatibene, M. Ferraris, G. Magnano
After reviewing the hole argument and its relations with initial value problem and general covariance, we shall discuss how much freedom one has to define the physical state of a s…
Nonlinear Gravitational Lagrangians revisited
Guido Magnano
The Legendre transformation method, applied in 1987 to deal with purely metric gravitational Lagrangians with nonlinear dependence on the Ricci tensor, is extended to metric-affine…