TY - JOUR AU - De Luca, Aldo TI - On some properties of the syntactic semigroup of a very pure subsemigroup JO - RAIRO. Informatique théorique PY - 1980 DA - 1980/// SP - 39 EP - 56 VL - 14 IS - 1 PB - EDP-Sciences UR - http://www.numdam.org/item/ITA_1980__14_1_39_0/ UR - https://zbmath.org/?q=an%3A0437.20053 UR - https://www.ams.org/mathscinet-getitem?mr=570037 LA - en ID - ITA_1980__14_1_39_0 ER -