  Compatible equations, Singularities of solutions, Topological charges and
quasi-charges.
  PhD thesis (translated frorm Russian).
  The book shows the sights of Absolute Parallelism (AP), and contains useful
information on the problem of singularities, compatibility theory, homotopy
groups (also relative and k-ad), topological quasi-charge groups and their
morphisms. AP is a single (frame) field theory proposed by Einstein some 80
years ago; it embraces symmetries of both Special and General Relativity.
  The compatibility theory, if applied to the cases when the frame matrix
degenerates, gives a covariant test on singularities of solutions. This gives a
single variant (missed in Einstein-Mayer's list of compatible equations), the
unique 5D equation (nothing, nor D, can be changed), which solutions are free
of emerging singularities. SO4-symmetrical nonstationary solutions give rise to
a cosmological model (relativistic surfing; anti-Milne model in FRW framework)
with a specific reduction of the extra-dimension.
  Topological classification of localized field configurations, combinatorics
of topological quasi-charges (quanta), is discussed in an attempt to imagine
the Standard Model (and quantum theory itself; and, perhaps, to make some
qualitative predictions, like the absence of spin zero elementary quanta).
