Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple non-extensive sparsification of the hierarchical matrices   In this paper, we consider the matrices approximated in H2 format. The direct
solution, as well as the preconditioning, of systems with such matrices is a
challenging problem. We propose a non-extensive sparse factorization of the H2
matrix that allows to substitute the direct H2 solution with the solution of
the system with an equivalent sparse matrix of the same size. The sparse
factorization is constructed out of parameters of the H2 matrix. In the
numerical experiments, we show the consistency of this approach in comparison
to the other approximate block low-rank hierarchical solvers, such as HODLR,
H2Lib and IFMM.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
1
The categories of this paper are: cs