Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The universal cover of a monomial triangular algebra without multiple
  arrows   Let A be a basic connected finite dimensional algebra over an algebraically
closed field k. Assuming that A is monomial and that the ordinary quiver Q of A
has no oriented cycle and no multiple arrows, we prove that A admits a
universal cover with group the fundamental group of the underlying space of Q.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an