Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fortelling catastrophes?   A generic saddle-node bifurcation is proposed to modelize fast transitions of
finite amplitude arising in geophysical (and perhaps other) contexts, when they
result from the intrinsic dynamics of the system. The fast transition is
generically preceded by a precursor phase which is less rapid, that we
characterize. In this model, if an external source of noise exist, the
correlation length of the fluctuations increases before the transition, and its
spectrum tends to drift towards lower frequencies. This change in the
fluctuations could be a way of detecting catastrophic events before they
happen.

25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph