Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Esquisse d'une synthese   Since antiquity, from Euclid of Alexandria to Galileo Galilei to Immanuel
Kant to Hermann Minkowksi to Albert Einstein, the question of the nature of
space and time has occupied scientists and philosophers. In the
four-dimensional space-time of Einstein's wonderful theory of gravity, the
squared interval, in units such that the speed of light is unity, is the
difference between a squared time increment and the sum of three squares
representing the three dimensions of spatial change. More recently higher
dimensional theories have been proposed, which aim to unify gravity with the
other forces in nature. Such theories typically have a hyperbolic character in
that there is one time variable and many spatial variables (rather than just
three) in the formula for the squared interval. Here a new physical theory is
advanced, based on spinors, which clearly predicts that the basic extra
dimensions are timelike: in its simplest form, there are three timelike and
three spatial degrees of freedom. It is expected that devices such as the Large
Hadron Collider will be sensitive to these new degrees of freedom and thus one
may hope that in the near future, this issue can be settled experimentally

15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci