Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Vanka-type multigrid solver for complex-shifted Laplacian systems from
  diagonalization-based parallel-in-time algorithms   We propose and analyze a Vanka-type multigrid solver for solving a sequence
of complex-shifted Laplacian systems arising in diagonalization-based
parallel-in-time algorithms for evolutionary equations. Under suitable
assumption, local Fourier analysis shows the proposed Vanka-type smoother
achieves a uniform smoothing factor, which is verified by several numerical
examples.

34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics