Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tropical Grassmannian and Tropical Linear Varieties from phylogenetic
  trees   In this paper we study tropicalization of Grassmannian and linear varieties.
In particular, we study the tropical linear spaces cor- responding to the
phylogenetic trees. We prove that corresponding to each subtree of the
phylogenetic tree there is a point on the tropical grassmannian. We deduce a
necessary and sufficient condition for it to be on the facet of the tropical
linear space.

32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn