Invariant Operators of Five-Dimensional Nonconjugate Subalgebras of the Lie Algebra of the Poincaré Group P(1,4)

Table 20

Invariant operators of subalgebras of the type 𝐴^𝑏𝑐_5,9.

Basis elements of subalgebras	Invariant operators
𝑏=1,𝑐=1∶2𝑎2𝑋4,𝑃1,𝑃2,𝑃3,𝐺+𝑎2𝑋1,𝑎2<0	𝑋4𝑃2,𝑋4𝑃3,𝑋4exp−𝑃12𝑎2𝑋4