Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The York Map and the Role of Non-Inertial Frames in the Geometrical View
  of the Gravitational Field   The role of non-inertial frames in a class of models of general relativity is
clarified by means of Dirac's theory of constraints. The identification of a
York canonical basis allows to give the interpretation of the gauge variables
as generalized inertial effects and to identify the Dirac observables of the
gravitational field with generalized tidal effects. York time is the gauge
variable controlling the clock synchronization convention. Differently from
special relativity, the instantaneous 3-spaces are dynamically determined.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an