Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The DESC Stellarator Code Suite Part II: Perturbation and continuation
  methods   A new perturbation and continuation method is presented for computing and
analyzing stellarator equilibria. The method is formally derived from a series
expansion about the equilibrium condition $F \equiv J \times B - \nabla p = 0$,
and an efficient algorithm for computing solutions to 2nd and 3rd order
perturbations is developed. The method has been implemented in the DESC
stellarator equilibrium code, using automatic differentiation to compute the
required derivatives. Examples are shown demonstrating its use for computing
complicated equilibria, perturbing a tokamak into a stellarator, and performing
parameter scans in pressure, rotational transform and boundary shape in a
fraction of the time required for a full solution.

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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio