Witt bordism
= Witt bordism
{c}
{title2=$\Omega_n^{\mathrm{Witt}}$}
Two closed oriented rational <Witt spaces> are Witt bordant if their signed disjoint union is the collared boundary of a compact oriented <Witt space with collared boundary>. Disjoint union gives the bordism group $\Omega_n^{\mathrm{Witt}}$.