The following four questions could be asked about each extremalproblem: 1. What are the conditions for an extremum of the problem (necessary, sufficient, necessary andsufficient)? 2. How to describe the evolution of sulutions if the problem is perturbed? 3. Does a solution to the problem exist...

The following four questions could be asked about each extremalproblem:1. What are the conditions for an extremum of theproblem (necessary, sufficient, necessary andsufficient)?2. How to describe the evolution of sulutions if theproblem is perturbed?3. Does a solution to the problem exist or...