Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Beyond Space And Time   The secret network of the universe: How quantum geometry might complete
Einstein's dream. - An informal introduction to quantum geometry (loop quantum
gravity), spin networks, quantum black holes, and the work of Abhay Ashtekar,
Carlo Rovelli, Lee Smolin and others.

0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph