Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regularizations of positive entropy pseudo-automorphisms   We study positive entropy birational automorphisms of threefolds. We identify
some conditions which imply that such an automorphism is non-regularizable. We
show that this criterion applies in the example of a positive entropy
birational automorphism of $\mathbb{P}^3$ constructed by J. Blanc, thus showing
that for a general choice of parameters it is non-regularizable. Additionally,
we establish a criterion which proves that the automorphism in this example
does not preserve a structure of a fibration over a surface.

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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
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The categories of this paper are: nlin