Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A survey of total positivity   We survey the history of totally positive matrices and the generalization to
Lie groups. We describe a reduction of a bilinear form to a canonical form
(generalizing the case of symplectic nondegenerate forms) using ideas from
total positivity; we also place this in a Lie group context. We give a short
exposition of results of Fock and Goncharov on the study of homomorphisms of
the fundamental group of a closed surface into a Lie group.

12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc