Bounded composition operator on Lorentz spacesWe study composition operators on 
Lorentz spaces. In particular, we obtain necessary and sufficient
 On Some Discrete Subgroups of The Lorentz GroupSome discrete subgroups of the 
Lorentz group are found using Fedorov’s parametrization by means
 Spinor representation of Maxwell's equations generic objects such as tensors. Thus, the group of 
Lorentz two-spinors is the covering group
 A NEW GENERALIZATION OF BOAS THEOREM FOR SOME LORENTZ SPACES Lambda(q)(omega)Let Lambda(q)(omega), q > 0, denote the 
Lorentz space equipped with the (quasi) norm parallel to f
 Order Sharp Estimates for Monotone Operators on Orlicz–Lorentz ClassesWe consider the monotone operator P, which maps Orlicz-
Lorentz class into some ideal space Y
 Spinor-Like Hamiltonian for Maxwellian Optics properties than the more generic objects such as tensors. The group of 
Lorentz two-spinors is the covering
 A note on the derivation of exact solutions for charged perfect fluid with vanishing Lorentz force be generalized to a charged perfect fluid solution with a vanishing 
Lorentz force if a particular condition
 MODULUS OF CONTINUITY FOR BESSEL TYPE POTENIIAL OVER LORENTZ SPACE of the generalized Bessel potentials constructed over the basic weighted 
Lorentz space. © 2021. The L.N. Gumilyov