Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The birational geometry of irregular Higgs bundles   We give a variant of the Beauville--Narasimhan--Ramanan correspondence for
irregular parabolic Higgs bundles with semi-simple irregular part and show that
it defines a Poisson isomorphism between certain irregular Dolbeault moduli
spaces of a curve and relative Picard bundles of families of ruled surfaces
over a curve.

21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc