Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasilocal mass in general relativity   There have been many attempts to define the notion of quasilocal mass for a
spacelike 2-surface in spacetime by the Hamilton-Jacobi analysis. The essential
difficulty in this approach is to identify the right choice of the background
configuration to be subtracted from the physical Hamiltonian. Quasilocal mass
should be nonnegative for surfaces in general spacetime and zero for surfaces
in flat spacetime. In this letter, we propose a new definition of
gauge-independent quasilocal mass and prove that it has the desired properties.

23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex