Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A canonical formalism of f(T)-type gravity in terms of Lie derivatives   A canonical formalism of f(R)-type gravity is proposed, resolving the problem
in the formalism of Buchbinder and Lyakhovich(BL). The new coordinates
corresponding to the time derivatives of the metric are taken to be its Lie
derivatives which is the same as in BL. The momenta canonically conjugate to
them and Hamiltonian density are defined similarly to the formalism of
Ostrogradski. It is shown that our method surely resolves the problem of BL.

37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph