Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-analytic behavior of 2D itinerant ferromagnets   We consider an ordered ferromagnet in the vicinity of a T=0 transition into a
paramagnet. We show that the free energy and the transverse and longitudinal
static susceptibilities contain non-analyticities which destroy a continuous
second-order transition. Depending on the parameters, the transition either
becomes first-order, or occurs via an intermediate spiral phase.

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph