In this paper, we introduce the concept of f -ideals and discuss its algebraic properties. In particular, we give the characterization of all the f -ideals of degree 2.
Running economy is defined as the energy demand at submaximal running speed, a key determinant of overall running performance. Strength training can improve running economy, although the magnitude of its effect may depend on factors such as…
Players without a club may be signed at any time, clubs may sign players on loan dependent on their league's regulations, and clubs may sign a goalkeeper on an emergency loan if they have no registered senior goalkeeper available.