2,026 research outputs found

    A new proof of Watson's theorem for the series 3F2(1)

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    We give a new proof of the classical Watson theorem for the summation of a 3F2 hypergeometric series of unit argument. The proof relies on the two well-known Gauss summation theorems for the 2F1 function

    Keck Observations of the Most Distant Galaxy: 8C1435+63 at z=4.25

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    We report on Keck observations and confirm the redshift of the most distant galaxy known: 8C1435+63 at z=4.25. The spectrum shows a strong Lyα\alpha line, a Lyα\alpha forest continuum break and a continuum break at λrest=912\lambda_{rest}=912\AA. The Lyα\alpha emission is spatially extended and roughly aligned with the radio source. The galaxy shows a double structure in the II-band (λrest\lambda_{rest}\approx1500\AA) which is aligned with the radio axis; the two II-band components spatially coincide with the nuclear and southern radio components. Some fraction of the II band emission could be due to a nonthermal process such as inverse compton scattering. In the KK-band (λrest\lambda_{rest}\approx4200\AA), which may be dominated by starlight, the galaxy has a very low surface brightness, diffuse morphology. The KK morphology shows little relationship to the radio source structure, although the major axis of the KK emission is elongated roughly in the direction of the radio source axis. The galaxian continuum is very red (IK>4I-K>4) and if the KK continuum is due to starlight, implies a formation redshift of zf>5z_f > 5. We speculate that this galaxy may be the progenitor of a present day cD galaxy.Comment: 4 pages + 4 figures; uuencoded tar compressed PostScript files; figures and tables included. To appear in 1 Jan 1995 issue of The Astrophysical Journal, Letters. Please direct requests/questions/comments to [email protected]

    A derivation of two quadratic transformations contiguous to that of Gauss via a differential equation approach

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    The purpose of this note is to provide an alternative proof of two quadratic transformation formulas contiguous to that of Gauss using a differential equation approach

    Real Asset Ownership and the Risk and Return to Stockholders

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    Many corporations own a significant amount of real assets and this includes real estate. However, the effect of real asset ownership on the risk and return for a firm’s stockholders is unknown. This study attempts to ascertain the effect, if any, of corporate real asset ownership on the risk and return to stockholders. Using data from 1985 through 1994, the results indicate a lack of diversification benefits associated with holding real assets.

    Free energy differences : Representations, estimators, and sampling strategies

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    In this thesis we examine methodologies for determining free energy differences (FEDs) of phases via Monte Carlo simulation. We identify and address three generic issues that arise in FED calculations; the choice of representation, the choice of estimator, and the choice of sampling strategy. In addition we discuss how the classical framework may be extended to take into account quantum effects. Key words: Phase Mapping, Phase Switch, Lattice Switch, Simulated Tempering, Multi-stage, Weighted Histogram Analysis Method, Fast Growth, Jarzynski method, Umbrella, Multicanonical, Path Integral Monte Carlo, Path Sampling, Multihamiltonian, fluctuation theoremComment: Ph.D. Thesis, University of Edinburgh, pdflatex, bibte
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