Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ubiquity of conical points in topological insulators   We show that generically, the degeneracies of a family of Hermitian matrices
depending on three parameters have a conical structure. Our result applies to
the study of topological phases of matter. It implies that adiabatic
deformations of two-dimensional topological insulators come generically with
Dirac-like propagating currents, whose total conductivity equals the chiral
number of conical points.

17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg