Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The equations of some dispersionless limit   This short article presents a table of new equations which can be regarded as
the generalized equations of the dispersionless limit of several nonlinear
equations. From the definition expressed in an algebraic formula, one can get
an equation for any positive numbers p and q. The equations were calculated by
using the computers and were examined by hand-calculation up to p=10. Relations
with some dispersionless hierarchies are mentioned.

20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph