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searching for Surgery obstruction 4 found (12 total)

Infinite dihedral group (595 words) [view diff] exact match in snippet view article find links to article

folding frequency. Connolly, Francis; Davis, James (August 2004). "The surgery obstruction groups of the infinite dihedral group". Geometry & Topology. 8 (3):

Obstruction theory (1,085 words) [view diff] exact match in snippet view article find links to article

there exists a normal map, allowing the definition of the secondary surgery obstruction in algebraic L-theory to performing surgery on the normal map to

Julius L. Shaneson (283 words) [view diff] exact match in snippet view article find links to article

contributions to topology". Shaneson, Julius L. (1969), "Wall's surgery obstruction groups for G × Z", Annals of Mathematics, Second Series, 90 (2):

Arf invariant (3,247 words) [view diff] exact match in snippet view article find links to article

μ(x)=0{\displaystyle \mu (x)=0}. The corresponding Kervaire invariant detects the surgery obstruction of (f,b){\displaystyle (f,b)} in the L-group L4k+2(Z)=Z2{\displaystyle