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From: Dan Christensen <jdc+news@uwo.ca>
Subject: C-d heuristics
Date: Tue, 12 Mar 2002 16:48:22 -0500	[thread overview]
Message-ID: <871yepo3tl.fsf@uwo.ca> (raw)

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Attached are two articles of a sort that I receive daily.
On the first one, if I hit C-d, I get a nice summary buffer
which uses the Authors field for the From information and
the Title field for the Subject.  But on the second one
I get the From information from the (less useful) From
header, and I get no subject.  Could the heuristics of
C-d be tweaked to handle the second case better?

I haven't been able to pinpoint why one of the two is
handled better currently.

-- 
Dan Christensen
jdc+news@uwo.ca


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Subject: Topics

Topics:
   gr-qc daily 0203014 -- 0203016 received 26
   math daily Subj-class mailing 40000 1


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Date: Tue, 5 Mar 2002 20:24:04 -0500
From: no-reply@arXiv.org (send mail ONLY to gr-qc)
To: rabble@arXiv.org (gr-qc daily title/abstract distribution)
Subject: gr-qc daily 0203014 -- 0203016 received 26
Message-Id: <200203060124.g261O4d25507@xxx.arxiv.cornell.edu>
MIME-Version: 1.0

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received from  Mon  4 Mar 02 21:00:00 GMT  to  Tue  5 Mar 02 21:00:00 GMT
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\\
Paper: gr-qc/0203014
From: Michele Vallisneri <vallis@its.caltech.edu>
Date: Mon, 4 Mar 2002 23:42:18 GMT   (36kb)

Title: Ephemeral point-events: is there a last remnant of physical objectivity?
Authors: Massimo Pauri and Michele Vallisneri
Comments: LaTeX, natbib, 34 pages. To be published in the Roberto Torretti
  Festschrift, Dialogos (2002)
\\
  For the past two decades, Einstein's Hole Argument (which deals with the
apparent indeterminateness of general relativity due to the general covariance
of the field equations) and its resolution in terms of Leibniz equivalence (the
statement that Riemannian geometries related by active diffeomorphisms
represent the same physical solution) have been the starting point for a lively
philosophical debate on the objectivity of the point-events of space-time. It
seems that Leibniz equivalence makes it impossible to consider the points of
the space-time manifold as physically individuated without recourse to
dynamical individuating fields. Various authors have posited that the metric
field itself can be used in this way, but nobody so far has considered the
problem of explicitly distilling the metrical fingerprint of point-events from
the gauge-dependent components of the metric field. Working in the Hamiltonian
formulation of general relativity, and building on the results of Lusanna and
Pauri (2002), we show how Bergmann and Komar's intrinsic pseudo-coordinates
(based on the value of curvature invariants) can be used to provide a physical
individuation of point-events in terms of the true degrees of freedom (the
Dirac observables) of the gravitational field, and we suggest how this
conceptual individuation could in principle be implemented with a well-defined
empirical procedure. We argue from these results that point-events retain a
significant kind of physical objectivity.
\\ ( http://arXiv.org/abs/gr-qc/0203014 ,  36kb)
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\\
Paper: gr-qc/0203015
From: Reg Cahill <reg.cahill@flinders.edu.au>
Date: Tue, 5 Mar 2002 04:41:44 GMT   (48kb)

Title: Process Physics: From Quantum Foam to General Relativity
Authors: Reginald T. Cahill
Comments: 26 pages Latex, 1 separate eps file
\\
  Progress in the new information-theoretic process physics is reported in
which the link to the phenomenology of general relativity is made. In process
physics the fundamental assumption is that reality is to be modelled as
self-organising semantic (or internal or relational) information using a
self-referentially limited neural network model. Previous progress in process
physics included the demonstration that space and quantum physics are emergent
and unified, with time a distinct non-geometric process, that quantum phenomena
are caused by fractal topological defects embedded in and forming a growing
three-dimensional fractal process-space, which is essentially a quantum foam.
Other features of the emergent physics were: quantum field theory with emergent
flavour and confined colour, limited causality and the Born quantum measurement
metarule, inertia, time-dilation effects, gravity and the equivalence
principle, a growing universe with a cosmological constant, black holes and
event horizons, and the emergence of classicality. Here general relativity and
the technical language of general covariance is seen not to be fundamental but
a phenomenological construct, arising as an amalgam of two distinct phenomena:
the `gravitational' characteristics of the emergent quantum foam for which
`matter' acts as a sink, and the classical `spacetime' measurement protocol,
but with the later violated by quantum measurement processes. Quantum gravity,
as manifested in the emergent Quantum Homotopic Field Theory of the
process-space or quantum foam, is logically prior to the emergence of the
general relativity phenomenology, and cannot be derived from it.
\\ ( http://arXiv.org/abs/gr-qc/0203015 ,  48kb)
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\\
Paper: gr-qc/0203016
From: Sawa Manoff <smanov@inrne.bas.bg>
Date: Tue, 5 Mar 2002 10:20:39 GMT   (30kb)

Title: Mechanics of Continuous Media in $(\bar{L}_n,g)$-spaces. I. Introduction
  and mathematical tools
Authors: Sawa Manoff
Comments: 34 pages, LaTeX
\\
  Basic notions and mathematical tools in continuum media mechanics are
recalled. The notion of exponent of a covariant differential operator is
introduced and on its basis the geometrical interpretation of the curvature and
the torsion in $(\bar{L}_n,g)$-spaces is considered. The Hodge (star) operator
is generalized for $(\bar{L}_n,g)$-spaces. The kinematic characteristics of a
flow are outline in brief. PACS numbers: 11.10.-z; 11.10.Ef; 7.10.+g; 47.75.+f;
47.90.+a; 83.10.Bb
\\ ( http://arXiv.org/abs/gr-qc/0203016 ,  30kb)
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\\
Paper (*cross-listing*): astro-ph/0203043
From: (Giallo) Israel <gianluca@ulysses.mporzio.astro.it>
Date: Mon, 4 Mar 2002 18:37:54 GMT   (115kb)

Title: RXJ0806.3+1527: a double degenerate binary with the shortest known
  orbital period (321s)
Authors: G.L. Israel, W. Hummel, S. Covino, S. Campana, I. Appenzeller, W.
  Gassler, K.-H. Mantel, G. Marconi, C.W. Mauche, U. Munari, I. Negueruela, H.
  Nicklas, G. Rupprecht, R.L. Smart, O. Stahl, L. Stella
Comments: Accepted for publication on A&A Letters
\\
  We carried out optical observations of the field of the X-ray pulsator
RXJ0806.3+1527. A blue V=21.1 star was found to be the only object consistent
with the X-ray position. VLT FORS spectra revealed a blue continuum with no
intrinsic absorption lines. Broad (v~1500 km/s), low equivalent width (about
-1/-6A) emission lines from the HeII Pickering series were clearly detected. B,
V and R time-resolved photometry revealed the presence of about 15% pulsations
at the 321s X-ray period, confirming the identification. These findings,
together with the period stability and absence of any additional modulation in
the 1min-5hr period range, argue in favour of the orbital interpretation of the
321s pulsations. The most likely scenario is thus that RXJ0806.3+1527 is a
double degenerate system of the AM CVn class. This would make RXJ0806.3+1527
the shortest orbital period binary currently known and one of the best
candidates for gravitational wave detection.
\\ ( http://arXiv.org/abs/astro-ph/0203043 ,  115kb)
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\\
Paper (*cross-listing*): hep-th/0203003
From: Amir Masoud Ghezelbash <amasoud@sciborg.uwaterloo.ca>
Date: Thu, 28 Feb 2002 22:14:05 GMT   (26kb)

Title: Vortices in De Sitter Spacetimes
Authors: A.M. Ghezelbash, R.B. Mann
Comments: 11 pages, 5 figures
Report-no: WATPPHYS-TH02/02
\\
  We investigate vortex solutions to the Abelian Higgs field equations in a
four dimensional de Sitter spacetime background. We obtain both static and
dynamic solutions with axial symmetry that are generalizations of the
Nielsen-Olesen gauge vortices in flat spacetime. The static solution is located
in the static patch of de Sitter space. We numerically solve the field
equations in an inflationary (big bang) patch and find a time dependent vortex
soution. We show that the effect of the vortex is to create a deficit angle in
the spacetime. We comment on the relationship of these solutions to their anti
de Sitter counterparts, and on their possible holographic interpretation.
\\ ( http://arXiv.org/abs/hep-th/0203003 ,  26kb)
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\\
Paper (*cross-listing*): hep-th/0203013
From: Patrick Peter <peter@iap.fr>
Date: Fri, 1 Mar 2002 18:04:07 GMT   (261kb)

Title: Primordial perturbations in a non singular bouncing universe model
Authors: Patrick Peter (IAP) and Nelson Pinto-Neto (CBPF)
Comments: 11 pages, RevTeX 4, 8 figures, submitted to Phys. Rev. D
\\
  We construct a simple non singular cosmological model in which the currently
observed expansion phase was preceded by a contraction. This is achieved, in
the framework of pure general relativity, by means of a radiation fluid and a
free scalar field having negative energy. We calculate the power spectrum of
the scalar perturbations that are produced in such a bouncing model and find
that, under the assumption of initial vacuum state for the quantum field
associated with the hydrodynamical perturbation, this leads to a spectral index
n=-1. The matching conditions applying to this bouncing model are derived and
shown to be different from those in the case of a sharp transition. We find
that if our bounce transition can be smoothly connected to a slowly contracting
phase, then the resulting power spectrum will be scale invariant.
\\ ( http://arXiv.org/abs/hep-th/0203013 ,  261kb)
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\\
Paper: gr-qc/0110010
replaced with revised version Tue, 5 Mar 2002 17:19:56 GMT   (13kb)

Title: Radiation from perfect mirrors starting from rest and the black body
  spectrum
Authors: A. Calogeracos (Division of Theoretical Mechanics, Hellenic Air Force
  Academy, Greece)
Comments: Typos corrected
\\ ( http://arXiv.org/abs/gr-qc/0110010 ,  13kb)
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\\
Title: Recent Seminal Results
Authors: Author One and Author Two
Comments: 3 pages, latex, no figures, mpeg simulations available at
  ftp://myhost.mydomain/path/file.mpg or at http://myhost.mydomain/RSR/file.mpg
Report-no: EFI-02-63
\\
text of abstract (you do not need  Abstract: ...)
\\
body of paper (as mime attachments, uuencoded .tar.gz .zip, etc.)


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Date: Tue, 5 Mar 2002 06:12:36 -0500
From: no-reply@arXiv.org (send mail ONLY to math)
To: rabble@arXiv.org (math daily title/abstract distribution)
Subject: math daily Subj-class mailing 40000 1
Message-Id: <200203051112.g25BCaj14182@xxx.arxiv.cornell.edu>
MIME-Version: 1.0

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 Submissions to:
Quantum Algebra
 received from  Fri  1 Mar 02 21:00:00 GMT  to  Mon  4 Mar 02 21:00:00 GMT
------------------------------------------------------------------------------
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Paper (*cross-listing*): math-ph/0203004
From: Mariano A del Olmo <olmo@wamba.cpd.uva.es>
Date: Mon, 4 Mar 2002 11:44:11 GMT   (12kb)

Title: Dynamical Systems and Quantum Bicrossproduct Algebras
Authors: Oscar Arratia and Mariano A. del Olmo
Comments: LaTeX, 12 pages
Subj-class: Mathematical Physics; Quantum Algebra
MSC-class: 58F25; 70D99; 17B37
\\
  We present a unified study of some aspects of quantum bicrossproduct algebras
of inhomogeneous Lie algebras, like Poincare, Galilei and Euclidean in N
dimensions. The action associated to the bicrossproduct structure allows to
obtain a nonlinear action over a new group linked to the translations. This new
nonlinear action associates a dynamical system to each generator which is the
object of study in this paper.
\\ ( http://arXiv.org/abs/math-ph/0203004 ,  12kb)
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\\
Paper: math.DS/0203018
From: Anatoly Vershik <avershik@mpim-bonn.mpg.de>
Date: Sat, 2 Mar 2002 17:48:45 GMT   (9kb)

Title: Graded Lie Algebras and dynamical systems
Authors: A.Vershik (St.Petersburg Mathematical Institute of Russian Acad.)
Comments: 10 pages, Latex
Report-no: ESI-1086
Subj-class: Dynamical Systems; Quantum Algebra; Operator Algebras
\\
  The general class of the graded Lie algebras is defined. These algebras could
be constructed using an arbitrary dynamical systems with discrete time and with
invarinat measure. In this papers we consider the case of the central extension
of Lie algebras which corresponds to the ordinary crossed product (as
associative algebra) - series A. The structure of those Lie algebras is similar
to Kac-Moody algebras, and these are a special case of so called algebras with
continuous root system which were introduced by author with M.Saveliev in
90-th. The central extension open a new possibilty in algebraic theory of
dynamical systems. The simpliest example corresponds to rotation of the circle
(sine-algebra="quantum torus") and to adding of unity the additvie group of the
p-adic integers.
\\ ( http://arXiv.org/abs/math/0203018 ,  9kb)
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\\
Paper: math.GT/0203012
From: Stavros Garoufalidis <stavros@maths.warwick.ac.uk>
Date: Fri, 1 Mar 2002 21:42:14 GMT   (27kb)

Title: Random walks and the colored Jones function
Authors: Stavros Garoufalidis and Martin Loebl
Comments: AMS-LaTeX, 13 pages with 12 figures
Subj-class: Geometric Topology; Quantum Algebra
\\
  It can be conjectured that the colored Jones function of a knot can be
computed in terms of counting paths on the graph of a planar projection of a
knot. On the combinatorial level, the colored Jones function can be replaced by
its weight system. We give two curious formulas for the weight system of a
colored Jones function: one in terms of the permanent of a matrix associated to
a chord diagram, and another in terms of counting paths of intersecting chords.
\\ ( http://arXiv.org/abs/math/0203012 ,  27kb)
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\\
Paper: math.RT/0202079
replaced with revised version Sun, 3 Mar 2002 21:44:22 GMT   (22kb)

Title: On primitive ideals
Author: Victor Ginzburg
Comments: 17pp., LaTeX, minor corrections made
Subj-class: Representation Theory; Rings and Algebras; Algebraic Geometry;
  Quantum Algebra
\\ ( http://arXiv.org/abs/math/0202079 ,  22kb)
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             reply	other threads:[~2002-03-12 21:48 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-03-12 21:48 Dan Christensen [this message]
2002-03-12 22:08 ` Ted Stern
2002-04-24  3:02 ` Dan Christensen
2002-04-24 11:25   ` Kai Großjohann
2002-04-24 18:59     ` Dan Christensen
2002-04-24 19:36       ` Kai Großjohann
2002-04-24 19:33 Ted Stern
2002-04-25  7:43 ` Kai Großjohann
2002-04-25  7:44 ` Kai Großjohann
2002-04-25 19:11 Ted Stern
2002-04-26 11:10 ` Kai Großjohann

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