TY - JOUR ID - Mojdeh2017 LB - Mojdeh2017 AU - Mojdeh, D. A. AU - Samadi, B. TI - On the inverse signed total domination number in graphs ST - On the inverse signed total domination number in graphs JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2017 VL - 37 IS - 3 SP - 447 EP - 456 DO - http://dx.doi.org/10.7494/OpMath.2017.37.3.447 UR - http://dx.doi.org/10.7494/OpMath.2017.37.3.447 AB - In this paper, we study the inverse signed total domination number in graphs and present new sharp lower and upper bounds on this parameter. For example by making use of the classic theorem of TurĂ¡n (1941), we present a sharp upper bound on \(K_{r+1}\)-free graphs for \(r\geq 2\). Also, we bound this parameter for a tree from below in terms of its order and the number of leaves and characterize all trees attaining this bound. KW - inverse signed total dominating function KW - inverse signed total domination number KW - \(k\)-tuple total domination number SN - 1232-9274 ER -