Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robust preconditioners for perturbed saddle-point problems and
  conservative discretizations of Biot's equations utilizing total pressure   We develop robust solvers for a class of perturbed saddle-point problems
arising in the study of a second-order elliptic equation in mixed form (in
terms of flux and potential), and of the four-field formulation of Biot's
consolidation problem for linear poroelasticity (using displacement, filtration
flux, total pressure and fluid pressure). The stability of the continuous
variational mixed problems, which hinges upon using adequately weighted spaces,
is addressed in detail; and the efficacy of the proposed preconditioners, as
well as their robustness with respect to relevant material properties, is
demonstrated through several numerical experiments.

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The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin