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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)

 
 

 

Wall manifolds with involution


Author: R. J. Rowlett
Journal: Trans. Amer. Math. Soc. 169 (1972), 153-162
MSC: Primary 57D75
DOI: https://doi.org/10.1090/S0002-9947-1972-0314076-0
MathSciNet review: 0314076
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Abstract: Consider smooth manifolds $W$ with involution $t$ and a Wall structure described by a map $f:W \to {S^1}$ such that $ft = f$. For such objects we define cobordism theories ${\text {W}}_\ast ^I$ (in case $W$ is closed, $t$ unrestricted), ${\text {W}}_ \ast ^F$ (for $W$ closed, $t$ fixed-point free), and ${\text {W}}_ \ast ^{{\text {rel}}}$ ($W$ with boundary, $t$ free on $W$). We prove that there is an exact sequence \[ 0 \to {\text {W}}_ \ast ^I \to {\text {W}}_ \ast ^{{\text {rel}}} \to {\text {W}}_ \ast ^F \to 0.\] As a corollary, ${\text {W}}_ \ast ^I$ imbeds in the cobordism of unoriented manifolds with involution. We also describe how ${\text {W}}_ \ast ^I$ determines the $2$-torsion in the cobordism of oriented manifolds with involution.


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Keywords: Wall manifold, orientation-preserving involution, equivariant cobordism
Article copyright: © Copyright 1972 American Mathematical Society