Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the effective cone of $\overline{\mathcal{M}}_{g,n}$   For every $g\geq 2$ and $n\geq g+1$ we exhibit infinitely many extremal
effective divisors in $\overline{\mathcal{M}}_{g,n}$ coming from the strata of
abelian differentials.

28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an