Let d be a finite tuple of commuting derivations on a field K. A classical result allows us to associate a numerical polynomial to d (the Kolchin polynomial), measuring the “growth rate” of d. A multi-variate version of the same polynomial is also…
Let d be a finite tuple of commuting derivations on a field K. A classical result allows us to associate a numerical polynomial to d (the Kolchin polynomial), measuring the “growth rate” of d. A multi-variate version of the same polynomial is also…