Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On kinematical constraints in Regge calculus   In the (3+1)D Hamiltonian Regge calculus (one of the coordinates, $ t$, is
continuous) conjugate variables are (defined on triangles of discrete 3D
section $ t=const$) finite connections and antisymmetric area bivectors. The
latter, however, are not independent, since triangles may have common edges.
This circumstance can be taken into account with the help of the set of
kinematical (that is, required to hold by definition of Regge manifold)
bilinear constraints on bivectors. Some of these contain derivatives over $ t$,
and taking them into account with the help of Lagrange multipliers would result
in the new dynamical variables not having analogs in the continuum theory. It
is shown that kinematical constraints with derivatives are consequences of eqs.
of motion for Regge action supplemented with the rest of these constraints
without derivatives and can be omitted; so the new dynamical variables do not
appear.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex