lemmaLemma 6.3Reversal invarianceLemma 6.3 (Reversal invariance). (EPAL2)R=EPAL2.(\mathsf{EPAL}_2)^R=\mathsf{EPAL}_2.(EPAL2)R=EPAL2.
Lemma 6.3 (Reversal invariance). (EPAL2)R=EPAL2.(\mathsf{EPAL}_2)^R=\mathsf{EPAL}_2.(EPAL2)R=EPAL2.