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The Einstein equations for a perfect fluid spatially homogeneous spacetime are studied in a unified manner by retaining the generality of certain parameters whose discrete values correspond to theâ€¦ (More)

The true analogues of superspace and conformal superspace for spatially homogeneous cosmology are introduced and discussed in relation to the kinematics of the evolution of Cauchy data from aâ€¦ (More)

- Donato Bini, Christian Cherubini, Robert T. Jantzen, Remo Ruffini
- 2002

A new version of the Teukolksy Master Equation, describing any massless field of different spin s = 1/2, 1, 3/2, 2 in the Kerr black hole, is presented here in the form of a wave equation containingâ€¦ (More)

- Robert T. Jantzen, Klaus Volpert
- The American Mathematical Monthly
- 2012

A two-parameter model for the Lorenz curve describing income distribution interpolating between self-similar behavior at the low and high ends of the income spectrum naturally leads to two separateâ€¦ (More)

- Andrzej Krasinski, Christoph G. Behr, +5 authors Wolfgang Kundt
- 2003

1 Written collectively as â€œGolden Oldie XXX; each author is signed under his segment. 2 Copernicus Astronomical Center, Polish Academy of Sciences, Warsaw, Poland; e-mail: akr@camk.edu.pl 3â€¦ (More)

The problem of finding the distance from a point to a curve is a standard exercise in calculus. If the curve is differentiable and has no endpoints, the connecting line segment from the given pointâ€¦ (More)

- DONATO BINI, PAOLO CARINI, Robert T. Jantzen

The tools developed in a preceding article for interpreting spacetime geometry in terms of all possible space-plus-time splitting approaches are applied to circular orbits in some familiar stationaryâ€¦ (More)

- PAOLO CARINI, Robert T. Jantzen
- 1996

Everyday experience with centrifugal forces has always guided thinking on the close relationship between gravitational forces and accelerated systems of reference. Once spatial gravitational forcesâ€¦ (More)

- Robert T. Jantzen, PAOLO CARINI
- 2001

Arguments are made in favor of broadening the scope of the various approaches to splitting spacetime into a single common framework in which measured quantities, derivative operations, and adaptedâ€¦ (More)

- Donato Bini, Robert T. Jantzen, Bahram Mashhoon
- 2008

The gravitomagnetic clock effect and the Sagnac effect for circularly rotating orbits in stationary axisymmetric spacetimes are studied from a relative observer point of view, clarifying theirâ€¦ (More)