Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cycles of Time in Classical Cosmology   We present exact solutions to the Friedmann equation in standard cosmology in
Weierstrass and Jacobi functions. The right hand side of the Friedmann equation
describing various contributions of matter sources is considered in generic
form. It is proved that the problem of integration of the Friedmann equation
for simple EoS of medium is reduced to solving Abel integrals for algebraic
functions.

12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess