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lemma

Lemma 6.3

Reversal invariance

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

Publication context

This statement is reproduced from Real-time multitape languages transfer to parsing expression grammars. Read it there for the surrounding definitions, proof, citations, and limitations.

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Foundational library snapshot 3a264faa09 · 2026-08-25