Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stereographically conjugate differential systems   Topological bases of behaviour of trajectories for autonomous differential
systems of the second order on sphere are stated. Stereographic atlas of
trajectories is constructed. Differential connections between trajectories of
stereographically conjugate differential systems are established. The behaviour
of trajectories in an neighbourhood of infinitely remote point of the phase
plane is investigated. Examples of global qualitative research of trajectories
of stereographically conjugate differential systems are given.

30
The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom