A new construction of bent functions based on {\mathbb{Z}} -bent functions

Dobbertin has embedded the problem of construction of bent functions in a recursive framework by using a generalization of bent functions called ${\mathbb{Z}}$ -bent functions. Following his ideas, we generalize the construction of partial spreads bent functions to partial spreads ${\mathbb{Z}}$ -bent functions of arbitrary level. Furthermore, we show how these partial spreads ${\mathbb{Z}}$ -bent functions give rise to a new construction of (classical) bent functions. Further, we construct a bent function on 8 variables which is inequivalent to all Maiorana–McFarland as well as PS _ap type bents. It is also shown that all bent functions on 6 variables, up to equivalence, can be obtained by our construction.