A simple expression of the Jarlskog determinant
  Making the whole determinant of the CKM matrix V real, the imaginary part of any one term of the determinant of V (e. g. |Im V_{31}V_{22}V_{13}|) is the Jarlskog determinant J. We also point out that the maximality of the weak CP violation is a physical statement 
Jihn E. Kim and Min-Seok Seo
hep-ph hep-ex math-ph math.MP