Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Applications of Lefschetz numbers in control theory   We develop some applications of techniques of the Lefschetz coincidence
theory in control theory. The topics are existence of equilibria and their
robustness, controllability and its robustness.

34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
3
The categories of this paper are: physics
19
The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg