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# ML FF NHYP1 MB

This tag specifies the power ${\displaystyle \zeta }$ of the polynomial kernel
${\displaystyle K\left(\mathbf {X} _{i},\mathbf {X} _{i_{\mathrm {B} }}\right)=\left[\beta \mathbf {X} _{i}^{(2)}\cdot \mathbf {X} _{i_{\mathrm {B} }}^{(2)}+(1-\beta )\mathbf {\hat {X}} _{i}^{(3)}\cdot \mathbf {\hat {X}} _{i_{\mathrm {B} }}^{(3)}\right]^{\zeta }.}$