#extremum__peak  the most extreme possible amount or value; "voltage peak"
  supertype:  limit.indefinite_quantity__limitation  the greatest amount of something that is possible or allowed; "there are limits on the amount you can bet"; "it is growing rapidly with no limitation in sight"
  subtype:  minimum.extremum__lowerlimit  the smallest possible quantity
  subtype:  maximum.extremum__upperlimit  the largest possible quantity

No statement uses or specializes extremum; click here to add one.