DASSOW, JÜRGENJÜRGENDASSOWManea, FlorinFlorinManeaMERCAŞ, ROBERTROBERTMERCAŞMÜLLER, MIKEMIKEMÜLLER2022-06-082022-06-082015https://resolver.sub.uni-goettingen.de/purl?gro-2/109992We introduce the inner palindromic closure as a new operation ♠, which consists in expanding a factor u to the left or right by a non-empty word v such that vu or uv, respectively, is a palindrome of minimal length. We investigate several language theoretic properties of the iterated inner palindromic closure ♠ (w) = U i≥0 ♠ i (w) of a word w.enjournal_article10.1142/S0129054114400231