Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reduction to first order of the Hamiltonian Constraint of General
  Relativity   In this work, a method for solving the constraints of general relativity is
presented, where first all geometrical objects are written in terms of a set of
orthonormal triads and a flat Weitzenbock connection, which depends on the
triads and on a flat spin connection. It is shown that the hamiltonian
constraint can be reduced from a second order equation to a first order one.
Even though the order of the equation is reduced, we do not get any extra
equations to solve by this procedure. A conformal decomposition is also
presented.

9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph