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We present the explicit metric forms for higher dimensional vanishing scalar invariant (V SI) Lorentzian spacetimes. We note that all of the V SI spacetimes belong to the higher dimensional Kundtâ€¦ (More)

- Nicos Pelavas
- 2009

We study Lorentzian spacetimes for which all scalar invariants constructed from the Riemann tensor and its covariant derivatives are constant (CSI spacetimes). We obtain a number of general resultsâ€¦ (More)

- Alan A. Coley, Nicos Pelavas, Roustam M. Zalaletdinov
- Physical review letters
- 2005

In the macroscopic gravity approach to the averaging problem in cosmology, the Einstein field equations on cosmological scales are modified by appropriate gravitational correlation terms. We presentâ€¦ (More)

In this paper we determine the class of four-dimensional Lorentzian manifolds that can be completely characterized by the scalar polynomial curvature invariants constructed from the Riemann tensorâ€¦ (More)

- Nicos Pelavas, Garry J. Heard, George Schattschneider
- 2014 Oceans - St. John's
- 2014

An overview of electromagnetic propagation in seawater is discussed with some applications found in the literature. An experiment involving vertical dipoles submerged in seawater was performed toâ€¦ (More)

We present a family of four-dimensional Lorentzian manifolds whose invariant classification requires the seventh covariant derivative of the curvature tensor. The spacetimes in questions are nullâ€¦ (More)

- Nicos Pelavas, Alan Coley
- 2004

Penrose [1] has argued that the initial cosmological singularity must be one of low entropy in order to explain the high isotropy of the observed universe and to be consistent with the second law ofâ€¦ (More)

Kundt spacetimes are of great importance in general relativity in 4 dimensions and have a number of topical applications in higher dimensions in the context of string theory. The degenerate Kundtâ€¦ (More)

We algebraically classify some higher dimensional spacetimes, including a number of vacuum solutions of the Einstein field equations which can represent higher dimensional black holes. We discussâ€¦ (More)

- Nicos Pelavas, Nicholas Neary, Kayll Lake
- 2000

This paper explores properties of the instantaneous ergo surface of a Kerr black hole. The surface area is evaluated in closed form. In terms of the mass (m) and angular velocity (a), to second orderâ€¦ (More)