Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of fluctuations below a stationary bifurcation to
  electroconvection in the planar nematic liquid crystal N4   We fitted $C({\bf k},\tau,\epsilon) \propto exp[-\sigma({\bf
k},\epsilon)\tau]$ to time-correlation functions $C({\bf k},\tau,\epsilon)$ of
structure factors $S({\bf k}, t, \epsilon)$ of shadowgraph images of
fluctuations below a supercritical bifurcation at $V_0 = V_c$ to
electro-convection of a planar nematic liquid crystal in the presence of a
voltage $V = \sqrt{2}V_0 cos(2\pi f t) $[${\bf k}= (p,q)$ is the wave vector
and $\epsilon \equiv V_0^2/V_{c}^2 - 1$]. There were stationary oblique
(normal) rolls at small (large) $f$. Fits of a modified Swift-Hohenberg form to
$\sigma({\bf k},\epsilon)$ gave $f$-dependent critical behavior for the minimum
decay rates $\sigma_0(\epsilon)$ and the correlations lengths
$\xi_{p,q}(\epsilon)

4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph