Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic field objects in terms of Balance of Geometric flows   This paper reviews our physical motivation for choosing appropriate formal
presentation of electromagnetic field objects (EMFO). Our view is based on the
understanding that EMFO are spatially finite entities carrying internal
dynamical structure, so, their available integral time stability should be
represented by appropriate adaptation of their internal dynamical structure to
corresponding local stress-energy-momentum balance relations with other
physical objects. This adaptation process has two aspects: internal and
external. Clearly, finding adequate internal dynamical structure giving
appropriate integral characteristics of the object, will bring also appropriate
behavior of EMFO as a whole. Therefore, the internal local
stress-energy-momentum balance among the subsystems of EMFO should formally be
presented by appropriately defined tensor-field quantities, which are meant to
suggest a dynamical understanding of the abilities of EMFO to successfully
communicate with all the rest physical world.

31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess