Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Approximate Kerr-like Metric with Quadrupole   A new approximate metric representing the spacetime of a rotating deformed
body is obtained by perturbing the Kerr metric to include til the second order
of the quadrupole moment. It has a simple form, because is Kerr-like. Its
Taylor expansion form coincides with second order quadrupole metrics with slow
rotation already found. Moreover, it can be transformed to an improved
Hartle-Thorne metric, this guarantees its validity to be useful in studying
compact object, and that it is possible to find an inner solution.

23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
2
The categories of this paper are: math
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas