(Z2)k-actions with fixed point set of constant codimension 2k‎+‎2v‎+‎1

By using the mathematical induction and constructing indecomposable classes, the ideal J ⁎ , k 2 k + 2 v + 1 of cobordism classes in the unoriented cobordism ring MO ⁎ containing a representative admitting a ( Z 2 ) k -action with fixed point set of constant codimension 2 k + 2 v + 1 is determined.