Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Water skin anomalies: density, elasticity, hydrophobicity, thermal
  stability, interface repulsivity, etc   Molecular undercoordination induced O:H-O bond relaxation and dual
polarization dictates the supersolid behavior of water skins interacting with
other substances such as flowing in nanochannels, dancing of water droplets,
floating of insects. The BOLS-NEP notion unifies the Wenzel-Cassie-Baxter
models and explains controllable transition between hydrophobicity and
hydrophilicity.

13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom