# Deviation of a local ring

$P(x)=\sum_{n\ge 0}x^n \operatorname{Tor}^R_n(k,k) = \prod_{n\ge 0} \frac{(1+t^{2n+1})^{\varepsilon_{2n}}}{(1-t^{2n+2})^{\varepsilon_{2n+1}}}.$