2025/08/25 by Rovenski, Vladimir
#Differential Geometry (math.DG) #FOS: Mathematics
paper · doi:10.48550/arxiv.2508.17755
The recent interest of geometers in the f-structures of K. Yano is motivated by the study of the dynamics of contact foliations, as well as their applications in theoretical physics. Weak metric f-structures on a smooth manifold, recently introduced by the author and R. Wolak, open a new perspective on the theory of classical structures. In the paper, we define structures of this kind, called weak nearly \cal S- and weak nearly \cal C- structures, study their geometry, e.g. their relations to Killing vector fields, and characterize weak nearly \cal S- and weak nearly \cal S- submanifolds in a weak nearly Kähler manifold.