Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metamaterials Mimicking Dynamic Spacetime, D-brane and Noncommutativity
  in String Theory   We propose an executable scheme to mimic the expanding cosmos in 1+2
dimensions in laboratory. Furthermore, we develop a general procedure to use
nonlinear metamaterials to mimic D-brane and noncommutativity in string theory.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys