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A complement to the theory of equivariant finiteness obstructions

机译:等变有限障碍理论的补充

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摘要

It is known ([1], [2]) that a construction of equivariant finiteness obstructions leads to a family Wa(X) of elements of the groups Ko(Z[no(WH(X))%]). We prove that every family {u>} of elements of the groups Ko(Z[iro(WH(X))a]) can be realized as the family of equivariant finiteness obstructions Wa (X) of an appropriate finitely dom?inated G-complex X, As an application of this result we show the natural equivalence of the geometric construction of equivariant finiteness obstruction ([5], [6]) and equivariant generalization of Wall's obstruction ([1], [2]).
机译:众所周知([1],[2]),等变有限性障碍的构造会导致族群Ko(Z [no(WH(X))%])的族Wa(X)。我们证明,组Ko(Z [iro(WH(XH))a])的元素的每个族{u>}都可以被实现为适当有限域G的等变有限性障碍Wa(X)的族。 -复数X,作为该结果的应用,我们证明了等变有限性障碍的几何构造的自然等价性[5],[6]和Wall的障碍物的等变推广([1],[2])。

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