Recently, there has been a great interest in studying the behavior of rational and nonlinear difference equations; see, for example, [1–20]. One of the most intriguing properties of solutions of difference equations is their boundedness character. There are numerous papers devoted, among others, to this research area, see; for example, [1–6, 9–19], and related references therein. It is said tha...

Most introductory robotics textbooks have been written from the mechanical engineering perspective. These texts spend hundreds of pages studying gears, motors, sensors, and other related topics. While a computer scientist needs to know something about these topics, he or she certainly is not concerned with them to the degree that the texts cover. Meanwhile, the texts leave out many of the topic...