Field of Iterated Laurent Series and its Brauer Group (1905.07068v2)

Abstract: The symbol length of ${_pBr}(k(!(\alpha_1)!)\dots(!(\alpha_n)!))$ for an algebraically closed field $k$ of $\operatorname{char}(k) \neq p$ is known to be $\lfloor \frac{n}{2} \rfloor$. We prove that the symbol length for the case of $\operatorname{char}(k) = p$ is rather $n-1$. We also show that pairs of anisotropic quadratic or bilinear $n$-fold Pfister forms over this field need not share an $(n-1)$-fold factor.