Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The canary tree   A canary tree is a tree of cardinality the continuum which has no uncountable
branch, but gains a branch whenever a stationary set is destroyed (without
adding reals). Canary trees are important in infinitary model theory. The
existence of a canary tree is independent of ZFC + GCH.

16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an