Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: T-model field equations: the general solution   We analyze the field equations for the perfect fluid solutions admitting a
group G$_3$ of isometries acting on orbits S$_2$ whose curvature has a gradient
that is tangent to the fluid flow (T-models). We propose several methods to
integrate the field equations and we present the general solution without the
need to calculate any integral.

3
The categories of this paper are: physics
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga