Now, create the field of (A,B). Consider the line segment in that field which you can choose- that line goes from (Ma+dM,Mb) to (Ma,Mb+dM)
What aspect of the field requires that most such line segments have a maximum at one endpoint?
Now, create the field of (A,B). Consider the line segment in that field which you can choose- that line goes from (Ma+dM,Mb) to (Ma,Mb+dM)
What aspect of the field requires that most such line segments have a maximum at one endpoint?