Results 11 to 20 of about 559,362 (165)
Physics Letters BAstrophysical black holes come from exact solutions of the Einstein field equations. Therefore, any alternative–such as a gravastar–must meet the same standard of mathematical accuracy and internal consistency.
Farook Rahaman +4 more
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On the Exact Solution for the Schrödinger Equation
ParticlesFor almost 75 years, the general solution for the Schrödinger equation was assumed to be generated by an exponential or a time-ordered exponential known as the Dyson series.
Yair Mulian
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EXACT INFLATIONARY SOLUTIONS [PDF]
International Journal of Modern Physics D, 1998 We present a new class of exact inflationary solutions for the evolution of a universe with spatial curvature, filled with a perfect fluid, a scalar field with potential V±(ϕ) = λ(ϕ2 ± δ2)2 and a cosmological constant Λ. With the V+(ϕ) potential and a negative cosmological constant, the scale factor experiments a graceful exit.
Piccinelli, Gabriella +2 more
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Exact solutions in Chiral cosmology [PDF]
General Relativity and Gravitation, 2019 10 pages, no figures, title changed, version accepted for publication by Gen.
Andronikos Paliathanasis +2 more
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Exact solutions to supergravity [PDF]
Nuclear Physics B, 1997 18 pages, latex, uses a4.sty, no ...
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In search of exact solutions [PDF]
Nature, 2001 Many-body systems, such as electrons flowing in a superconductor, are among the most difficult theoretical problems to study. A new family of exactly solvable models may offer some answers.
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Graham's number stable digits: An exact solution [PDF]
Notes on Number Theory and Discrete MathematicsIn the decimal numeral system, we prove that the well-known Graham's number, G:=ⁿ3 (i.e., 3^{3^{...^{3}}} (n times)), and any base 3 tetration whose hyperexponent is larger than n share the same slog₃(G)-1 rightmost digits (where slog indicates the ...
Marco Ripà
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Exact solution of the Φ23 finite matrix model
Nuclear Physics B, 2022 We find the exact solutions of the Φ23 finite matrix model (Grosse-Wulkenhaar model). In the Φ23 finite matrix model, multipoint correlation functions are expressed as G|a11…aN11|…|a1B…aNBB|.
Naoyuki Kanomata, Akifumi Sako
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An exact interior Kerr solution [PDF]
New Astronomy, 2018 We present a simple exact solution for the interior of a rotating star. The interpretation of the stress energy tensor as that of a fluid requires the existence of a high viscosity, which is quite expected for a rotating fluid. In spite of the negative stresses, energy conditions are in fact all satisfied.
Ravi, Aravind P, Banerjee, Narayan
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Anisotropic Stars: Exact Solutions [PDF]
General Relativity and Gravitation, 2002 We study the effects of anisotropic pressure on the properties of spherically symmetric, gravitationally bound objects. We consider the full general relativistic treatment of this problem and obtain exact solutions for various form of equations of state connecting the radial and tangential pressures.
Dev, Krsna, Gleiser, Marcelo
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