设(M,T)是一个带有光滑对合T的光滑闭流形,T在M上的不动点集为F={x}T(x)=X,X∈M),则F为M的闭子流形的不交并.本文证明了:当F=P(2m,21+1)uP(2m,2n+1)时,其中n〉l≥m,m≠1,3,(M,T)协边于零.
Let (M, T) be a smooth closed manifold with a smooth involution T whose fixed point set is F = {x|T(x) = x, x ∈ M}, then F is the disjoint union of smooth closed submanifold of M. In this paper, we discuss: for F=P(2m,2l+1)∪P(2m,2n+1), n 〉 l≥m,m≠ 1, 3, then (M, T) is bounded.