The characteristic classes and Weyl invariants of Spinor groups
2018
Based on a pair of cohomology operations on so called $\delta-2$-formal spaces, we construct the integral cohomology rings of the classifying spaces of the Lie groups $Spin(n)$ and $Spin^{c}(n)$. As applications, we introduce characteristic classes for the reduced topological $K_{Spin}$ theory, determine the ring of integral Weyl invariants of the group $Spin(n)$, and generalize the classical Rokhlin Theorem.
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