Vasyl M. FEDORCHUK
Pedagogical Academy, Institute of Mathematics,
Podchorazych 2, 30-084, Krakow, POLAND;
and
Pidstryhach Institute of Applied Problems of Mechanics and Mathematics,
of the National Ukrainian Academy of Sciences,
3b Naukova Street, Lviv, 79601, UKRAINE
E-mail: fedorchuk@ap.krakow.pl

Volodymyr I. FEDORCHUK
Franko Lviv National University,
1 Universytetska Street, Lviv, 79000, UKRAINE
E-mail: fedorchukv@ukr.net

On the differential first-order invariants of the non-splitting subgroups of the Poincar\'e group P(1,4)

Abstract:
The differential first-order invariant for all non-splitting subgroups of the generalized Poincar\'e group P(1,4) are constructed.