Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the extremal Betti numbers of binomial edge ideals of block graphs   We compute one of the distinguished extremal Betti number of the binomial
edge ideal of a block graph, and classify all block graphs admitting precisely
one extremal Betti number.

6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg