Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiperiodic extended Bloch states in a surface wave experiment   Bloch-like surface waves associated with a quasiperiodic structure are
observed for the first time in a classic wave propagation experiment which
consists of pulse propagation with a shallow fluid covering a quasiperiodically
drilled bottom. We show that a transversal pulse propagates as a plane wave
with quasiperiodic modulation, displaying the characteristic undulatory
propagation in this quasiperiodic systems and reinforcing the idea that
analogous concepts to Bloch functions can be applied to quasicrystals under
certain circumstances.

22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ