Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple Braids   We study a subset of square free positive braids and we give a few algebraic
characterizations of them and one geometric characterization: the set of
positive braids whose closures are unlinks. We describe canonical forms of
these braids and of their conjugacy classes.

24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin