[institut] Seminar Grupe za cestice i gravitaciju

[Branislav Cvetkovic]

Postovane kolege,

U petak 29. novembra u 11 h na Institutu za fiziku, u sali 360, Jan 
Novak  sa Tehnickog Univerziteta u Liberecu (Ceska)
ce odrzati seminar pod naslovom "Ring paradigm as a new approach to 
quantum gravity".
Apstrakt vam prosledjujem u nastavku.

                                             Pozdrav Branislav Cvetkovic

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Abstract:
One of the quickly developing mathematical disciplines is algebraic 
geometry. We will study plabic (planar bicolored) graphs. We define 
LE-diagrams and decorated permutations and we mention that these three 
notions are interconnected. We further introduce winding index and 
formal boundary measurements. The Amplituhedron $A_{n,k,m}$ is the image 
in the Grassmannian $Gr_{k(k+m)}$ of the totally nonnegative part of 
$Gr_{k,n}$ under a linear map. It was introduced in 2013 in order to 
give a geometric basis for the computation in physics.

We show a completely different possible usage of plabic graphs in 
quantum gravity, which is a work in progress. We will start with 
philosophical background. We explain the basic idea in physics and then 
we state the basic directions in future research.
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Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/