Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-normability of spaces of Keplerian orbits   We prove that spaces of Keplerian curvilinear orbits, all orbits and elliptic
orbits with marked pericenter cannot carry a norm, compatible with their
standard topology. We also prove that the space of Keplerian elliptic orbits
without marked pericenter cannot carry a norm, compatible with the natural
metrics on it.

31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg