**Matti Pitkanen** (*matpitka@pcu.helsinki.fi*)

*Mon, 17 May 1999 07:44:24 +0300 (EET DST)*

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Dear Hitoshi,

could you explain how scalar wave equation results in Frieden's theory.

How the possible problems related to the signature of Minkowski metric

are handled? And how I-J composition appears at the level of

scalar wave equation.

Matti Pitkanen

On Sun, 16 May 1999, Hitoshi Kitada wrote:

*> Dear Stephen,
*

*>
*

*> I mixed things:
*

*>
*

*> ----- Original Message -----
*

*> From: Hitoshi Kitada <hitoshi@kitada.com>
*

*> To: Stephen P. King <stephenk1@home.com>
*

*> Cc: <time@kitada.com>
*

*> Sent: Sunday, May 16, 1999 8:24 PM
*

*> Subject: [time 317] Re: [time 285] Re: [time 279] Re: [time 278] Re: [time
*

*> 276] [Fwd: Fisher information]
*

*>
*

*>
*

*> > Dear Stephen,
*

*> >
*

*> > I got the book of Frieden. It is interesting. I now begin changing my
*

*> > reservation I wrote in the following quotation.
*

*> >
*

*> > He discusses the error which necessarily arises in the closed
*

*> > observations (errors are associated with any closed observation: if the
*

*> > observation can be considered open as in Peter's paper, the error does
*

*> > not exist), and as a minimizing solution of the error,
*

*>
*

*> This is my misunderstanding: Frieden obtains Lagrangian by minmizing the
*

*> Fisher information I, which decreases, as time goes to infinity, to a
*

*> minimum that is an equivalent of an equilibrium. This, by Cramer-Rao
*

*> inequality
*

*>
*

*> e^2 I >= 1,
*

*>
*

*> means that the minimum of the error e becomes the largest. His equilibrium
*

*> corresponds to the state with maximum entropy.
*

*>
*

*> Best,
*

*> Hitoshi
*

*>
*

*> he derives
*

*> > physics laws in the form of Lagrangians for each specific physical
*

*> > observation. Thus errors are the cause of physics in his context.
*

*> >
*

*> > In the context of Local Systems theory, this each Lagrangian seems to
*

*> > correspond to a factor in the factorization of the universe, e.g. in the
*

*> > factorization X x R^6, the first factor corresponds to GR and the second
*

*> > to QM. Maybe my method would give a unification of all kinds of
*

*> > observation. Here I mean by observation, GR, QM, Electromagnetism, QED,
*

*> > ... So the universe is a tensor product of infinite number of factors,
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*> > each factor of which corresponds to each theory. The unification would
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*> > be given as a reconciliation by means of some translation among theories
*

*> > that makes them commensurable with each other (as the relativistic
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*> > "correction" of QM values gives the relativistic QM results).
*

*> >
*

*> > The book seems well written, although I am still at the second chapter.
*

*> > Hillman's critiques you posted in [time 314] might apply to the
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*> > differential geometry part (I do not reach that part). But the
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*> > philosophy of the book is clear. The ambiguity which I felt when reading
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*> > the advertisement is not in the book.
*

*> >
*

*> > Best wishes,
*

*> > Hitoshi
*

*> >
*

*> >
*

*>
*

*>
*

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