Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A modification of the Chen-Nester quasilocal expressions   Chen and Nester proposed four boundary expressions for the quasilocal
quantities using the covariant Hamiltonian formalism. Based on these four
expressions, there is a simple generalization that one can consider, so that a
two parameter set of boundary expressions can be constructed. Using these
modified expressions, a nice result for gravitational energy-momentum can be
obtained in holonomic frames.

27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex