Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The scalability of the matrices in direct Trefftz method in 2D Laplace
  problem   This paper presents an interesting property of the matrices that may be
obtained with the use of direct Trefftz method. It is proved analytically for
2D Laplace problem that values of the elements of matrices describing the
capacitance of two scaled domains are inversely proportional to the scalability
factor. As an example of the application the capacitance extraction problem is
chosen. Concise description of the algorithm in which the scalability property
can be utilized is given. Furthermore some numerical results of the algorithm
are presented.

3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an