A note on special duality triads and their operator valued counterparts
  We shall work with the so called duality triads following kwa\'sniewski. In particular in this note we propose some extensions of them - hence we choose such special class of triads that admit - all at once - a unified combinatorial interpretation in a way konvalina does. The proposed extensions contain also definition of operator valued arrays of konvalina-like coefficients - for the sake of future investigation and applications. 
Ewa Borak