Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: f(T) Gravity and local Lorentz invariance   We show that in theories of generalised teleparallel gravity, whose
Lagrangians are algebraic functions of the usual teleparallel Lagrangian, the
action and the field equations are not invariant under local Lorentz
transformations. We also argue that these theories appear to have extra degrees
of freedom with respect to general relativity. The usual teleparallel
Lagrangian, which has been extensively studied and leads to a theory
dynamically equivalent to general relativity, is an exception. Both of these
facts appear to have been overlooked in the recent literature on f(T) gravity,
but are crucial for assessing the viability of these theories as alternative
explanations for the acceleration of the universe.

37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an