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- Rainer K. Sachs, A. Krasinski, Maciej Przanowski
- 2009

Assumptions about properties of congruences of curves in a spacetime have powerful implications for the Weyl tensor. A well-known example is the conclusion that follows from the propagation equationsâ€¦ (More)

- A. 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)

- A. Krasinski
- 1998

This is the third and last part of a series of 3 papers. Using the same method and the same coordinates as in parts 1 and 2, rotating dust solutions of Einsteinâ€™s equations are investigated thatâ€¦ (More)

- A. Krasinski, N. Copernicus
- 2000

The program Ortocartan for algebraic calculations in relativity has just been implemented in the Codemist Standard Lisp and can now be used under the Windows 98 and Linux operating systems. The paperâ€¦ (More)

- Charles Hellaby, A. Krasinski
- 2008

We study the properties and behavior of the quasipseudospherical and quasiplanar Szekeres models, obtain the regularity conditions, and analyze their consequences. The quantities associated withâ€¦ (More)

- A. Krasinski, Charles Hellaby
- 2003

We construct two models of the formation of a galaxy with a central black hole, starting from a small initial fluctuation at recombination. This is an application of previously developed methods toâ€¦ (More)

- M.-N. CÃ©lÃ©rier, Krzysztof Bolejko, A. Krasinski
- 2009

Context. LemaÃ®tre-Tolman (L-T) toy models with a central observer have been used to study the effect of large scale inhomogeneities on the SN Ia dimming. Claims that a giant void is mandatory toâ€¦ (More)

- A. Krasinski
- 2008

Geometrical and topological properties of the quasi-plane Szekeres model and of the plane symmetric dust model are discussed. Some related comments on the quasihyperbolical model are made. Theseâ€¦ (More)

- PrzemysÅ‚aw Jacewicz, A. Krasinski
- 2011

In this article we present a model of formation of a galaxy with a black hole in the center. It is based on the LemaÃ®treâ€“Tolman solution and is a refinement of an earlier model. The most importantâ€¦ (More)

- A. Krasinski
- 2003

In continuing our earlier research, we find the formulae needed to determine the arbitrary functions in the LemÃ¢Ä±tre-Tolman model when the evolution proceeds from a given initial velocityâ€¦ (More)