The multiplicity and the Cohen–Macaulayness of extended Rees algebras of equimultiple ideals

The paper "The multiplicity and the Cohen–Macaulayness of extended Rees algebras of equimultiple ideals" gives some multiplicity formulas of the extended Rees algebras \({\rm{T = A[It}}{\rm{,}}{{\rm{t}}^{ - 1}}{\rm{]}}\). In the case A generalized Cohen–Macaulay, we determine when T is Cohen–Macaulay and as an immediate consequence we obtain e.g., some criteria for the Cohen–Macaulayness of Rees algebra R(I) over a Cohen–Macaulay ring in terms of reduction numbers and ideals.