Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pedagogical Introduction to Extra Dimensions   Extra dimensions provide a new window on a number of problems faced by the
Standard Model. The following provides an introduction to this very broad
subject aimed at experimental graduate students and post-docs based on a
lecture given at the 2004 SLAC Summer Institute.

26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc