Convex Optimization, Convex Sets, Convex Function, Convex Hull, Convexity.
sets above, the line segments a and b join points x1-x2 and x3-x4 respectively in all the 3 sets. Of course, it is implied that these figures (above and below) represent the area in which the points constituting the respective sets are distributed. As can be clearly seen, any point on these line