We use the recently introduced concept of a Scaled Relative Graph (SRG) to develop graphical analysis input-output properties feedback systems. The SRG nonlinear operator generalizes Nyquist diagram an LTI system. In spirit classical control theory, important robustness indicators systems are measured as distances between SRGs.

in this paper we investigate the green‎ ‎graphs for the regular and inverse semigroups by considering the‎ ‎green classes of them‎. ‎and by using the properties of these‎ ‎semigroups‎, ‎we prove that all of the five green graphs for the‎ ‎inverse semigroups are isomorphic complete graphs‎, ‎while this‎ ‎doesn't hold for the regular semigroups‎. ‎in other words‎, ‎we prove‎ ‎that in a regular se...

Graphical abstracts (GAs), also known as visual abstracts, are powerful tools for communicating complex information and ideas clearly concisely. These representations aim to capture the essential findings central message of a research study, allowing audience understand remember its content quickly. This review article describes current state GAs, including their benefits, limitations, future d...