Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical control of the constraints growth in free evolutions of
  Einstein's equations   I present a new, simple method to dynamically control the growth of the
discretized constraints during a free evolution of Einstein's equations. During
an evolution, any given family of formulations is adjusted off the constraints
surface in a way such that, for any chosen numerical method and arbitrary but
fixed resolution, the constraints growth can be minimized with respect to the
freedom allowed by the formulation. In particular, provided there is enough
freedom, the discretized constraints can be maintained close to its initial
truncation value for all times, or decay from it.
  No a priori knowledge of the solution is needed, and the method can be
applied to any formulation of Einstein's equations without affecting
hyperbolicity. This method is independent of the numerical algorithm and
accounts for constraint violating modes introduced both by continuum
instabilities of the formulation and by the numerical method.

23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat