Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boundary induced amplification and nonlinear instability of interchange
  modes   It is shown that small distortions on the boundaries are amplified in the
core of a magnetized plasma if the system is close to marginal stability for
the ideal magnetohydrodynamic interchange mode. It is also shown that such
marginal systems can be nonlinearly unstable. The combination of boundary
amplification and nonlinearity is shown to result in a nonlinear instability.
The induced instability is highly sensitive to the boundary in that, if the
fractional deviation from marginality is a small parameter $b$, the system can
go unstable from fractional boundary distortions of $\mathcal{O}(b^{3/2})$.

36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph