Extended Abstracts February 2016 Positivity and Valuations - Alberich-Carramiñana, Maria; Alberich-Carramiñana, Maria; Galindo, Carlos; Galindo, Carlos; Küronya, Alex; Küronya, Alex; Roé, Joaquim; Roé, Joaquim (Springer International Publishing : Imprint: Birkhäuser, 2018)