Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On reduced models for gravity waves generated by moving bodies   In 1982, Marshall P. Tulin published a report proposing a framework for
reducing the equations for gravity waves generated by moving bodies into a
single nonlinear differential equation solvable in closed form [Proc. 14th
Symp. on Naval Hydrodynamics, 1982, pp.19-51]. Several new and puzzling issues
were highlighted by Tulin, notably the existence of weak and strong wave-making
regimes, and the paradoxical fact that the theory seemed to be applicable to
flows at low speeds, "but not too low speeds". These important issues were left
unanswered, and despite the novelty of the ideas, Tulin's report fell into
relative obscurity. Now thirty years later, we will revive Tulin's
observations, and explain how an asymptotically consistent framework allows us
to address these concerns. Most notably, we will explain, using the asymptotic
method of steepest descents, how the production of free-surface waves can be
related to the arrangement of integration contours connected to the shape of
the moving body. This approach provides an intuitive and visual procedure for
studying nonlinear wave-body interactions.

12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess