Date: Thu, 27 Feb 2003 14:02:20 +0100

From: igor.bogdanov

To: woit@cpw.math.columbia.edu

Subject: String theorist

Dear Dr Woit,

Long time after the whole "affaire" (but which "affaire")cooled down, we

would like to express our views ont two things :

I. We have read your papers about string theory. As you have noticed we

are not part of this field and do not share the targets and methods. We

could not agree more with your conclusions that string theory has no

connections with real world.

II. We are trying to open new roads. As you know, our main purpose is to

understand and describe the initial singularity of spacetime. We think

we do not contradict any physics when we claim that initial singularity

does not belong to the realm of physics. As far as we can see, it is a

pure mathematical object. For this reason, we have applied TQFT to bring

a workable solution. Our model is quite simple :

1. Scale > Planck scale (physical world) : lorentzian metric

2. Scale between 0 and Planck scale (quantum gravitity world) :

superposition between lorentzian and euclidean metrics

3. Scale 0 (Topological world) : euclidean metric

In fact, we use quantum groups theory to describe this very speculative

domain which lays beyond physics (see our paper on arXiv "A New Cocycle

Bicrossproduct by Twisting" : it is a pure mathematical result, but we

have extract of it a frame wchich could describe the signature

fluctuation at the Planck scale). That's the reason why we do not

unerstand the very unfair critics concerning our works clearly described

by us as mathematical.

Indeed, what is wrong with this approach? We would be very happy to have

your comments on this topic.

Thank you for you kind attention,

Best regards,

Igor Bogdanoff

Grichka Bogdanoff

Mathematical laboratory UPRES-A 5029

University of Bourgogne