Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unmissing the Missing Matter in Neo-Kaluza-Klein Universes   Uncompactified KK universes are so intrinsically connected to the otherwise
only empirically required "missing" Dark Matter (DM), that:
  1) They yield a simple prediction which explains both the enigma of the
extra-dimensions' (XD) unobservability and the enigma of the present DM. The
two enigmas are "annihilated" into the hypothesis of "missing light", or better
of "photonland". This eliminates the very need to hypothesize/search/find
DM-candidates of exceptional/exotic properties to explain their darkness.
  2) An early, spontaneous gravitational XD-collapse of their natural 5D-DM
replaces KK's compactification mechanisms and cylindricity condition, and
(partly?) eliminates the quandary of the radically insufficient density
fluctuations.

28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol