Fig. 1

Spacetime mapping - \(\pmb {\Lambda }\) associates convective propagation into static ones; the vice versa is done by its inverse \(\pmb {\Lambda }^{-1}\).
Spacetime mapping - \(\pmb {\Lambda }\) associates convective propagation into static ones; the vice versa is done by its inverse \(\pmb {\Lambda }^{-1}\).