Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Rest-Frame Instant Form of Metric Gravity   In a special class of globally hyperbolic, topologically trivial,
asymptotically flat at spatial infinity spacetimes selected by the requirement
of absence of supertranslations (compatible with Christodoulou-Klainermann
spacetimes) it is possible to define the {\it rest-frame instant form} of ADM
canonical gravity by using Dirac's strategy of adding ten extra variables at
spatial infinity and ten extra first class constraints implying the gauge
nature of these variables. The final canonical Hamiltonian is the weak ADM
energy and a discussion of the Hamiltonian gauge transformations generated by
the eight first class ADM constraints is given. When there is matter and the
Newton constant is switched off, one recovers the description of the matter on
the Wigner hyperplanes of the rest-frame instant form of dynamics in Minkowski
spacetime.

14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph