**Stephen Paul King** (*stephenk1@home.com*)

*Mon, 05 Jul 1999 23:05:49 GMT*

**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Next message:**Hitoshi Kitada: "[time 431] Fw: BOUNCE time: Non-member submission from [ca314159 <ca314159@bestweb.net>]"**Previous message:**Matti Pitkanen: "[time 429] Self and binding"**In reply to:**Stephen P. King: "[time 428] Re: Dualling with Duality"

On 5 Jul 1999 14:51:24 -0700, baez@galaxy.ucr.edu (John Baez) wrote:

*>In article <tjLf3.2927$re6.60259@news2.randori.com>,
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*>Richard Crew <crew@math.ufl.edu> wrote:
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*>
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*>> I've always wondered why it is that physicists are perfectly willing to
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*>> add extra spatial dimensions to the space-time continuum, but not extra
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*>> time dimensions.
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*>
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*>Because nobody wants to be called a lousy cheatin' two-timer!
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*>
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*>Actually M-theory, which lives in 11 dimensions, may be related
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*>to a 13-dimensional theory in which time is 2-dimensional. Try
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*>reading these papers:
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*>
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*>http://xxx.lanl.gov/abs/hep-th/9809034
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*>
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*>Two-Time Physics
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*>Itzhak Bars
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*>
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*>We give an overview of the correspondence between one-time-physics and
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*>two-time-physics. This is characterized by the presence of an SO(d,2)
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*>symmetry and an Sp(2) duality among diverse one-time-physics systems
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*>all of which can be lifted to the same more symmetric two-time-physics
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*>system by the addition of gauge degrees of freedom. We provide several
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*>explicit examples of physical systems that support this correspondence.
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*>The example of a particle moving in (AdS_D) X (S^n), with SO(D+n,2)
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*>symmetry which is larger than the popularly known symmetry SO(D-1,2) X
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*>SO(n+1) for this case, should be of special current interest in view of
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*>the proposed AdS-CFT duality.
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*>
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*>http://xxx.lanl.gov/abs/hep-th/9904063
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*>
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*>Lifting M-theory to Two-Time Physics
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*>I. Bars, C. Deliduman, D. Minic
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*>
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*>M-theory has different global supersymmetry structures in its various dual
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*>incarnations, as characterized by the M-algebra in 11D, the type IIA,
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*>type-IIB, heterotic, type-I extended supersymmetries in 10D, and non-Abelian
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*>supersymmetries in the AdS_n x S^m backgrounds. We show that all of these
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*>supersymmetries are unified within the supersymmetry OSp(1/64), thus hinting
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*>that the overall global spacetime symmetry of M-theory is OSp(1/64). We
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*>suggest that the larger symmetries contained within OSp(1/64) which go beyond
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*>the familiar symmetries, are non-linearly realized hidden symmetries of
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*>M-theory. These can be made manifest by lifting 11D M-theory to the
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*>formalism of two-time physics in 13D by adding gauge degrees of freedom.
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*>We illustrate this idea by constructing a toy M-model on the worldline in
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*>13D with manifest OSp(1/64) global supersymmetry, and a number of new local
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*>symmetries that remove ghosts. Some of the local symmetries are bosonic
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*>cousins of kappa supersymmetries. The model contains 0-superbrane and
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*>p-forms (for p=3,6) as degrees of freedom. The gauge symmetries can be fixed
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*>in various ways to come down to a one time physics model in 11D, 10D,
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*>AdS_n x S^m, etc., such that the linearly realized part of OSp(1/64) is
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*>the global symmetry of the various dual sectors of M-theory.
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*>
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*>
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*>
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**Next message:**Hitoshi Kitada: "[time 431] Fw: BOUNCE time: Non-member submission from [ca314159 <ca314159@bestweb.net>]"**Previous message:**Matti Pitkanen: "[time 429] Self and binding"**In reply to:**Stephen P. King: "[time 428] Re: Dualling with Duality"

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