Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Testing excision techniques for dynamical 3D black hole evolutions   We perform both distorted black hole evolutions and binary black hole head on
collisions and compare the results of using a full grid to results obtained by
excising the black hole interiors. In both cases the evolutions are found to
run essentially indefinitely, and produce the same, convergent waveforms.
Further, since both the distorted black holes and the head-on collision of
puncture initial data can be carried out without excision, they provide an
excellent dynamical test-bed for excision codes. This provides a strong
numerical demonstration of the validity of the excision idea, namely the event
horizon can be made to "protect" the spacetime from the excision boundary and
allow an accurate exterior evolution.

17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat