Scale dependence and collinear subtraction terms for Higgs production in gluon fusion at N3LO

The full, explicit, scale dependence of the inclusive (NLO)-L-3 cross section for single Higgs hadroproduction is obtained by calculating the convolutions of collinear splitting kernels with lower-order partonic cross sections. We provide results for all convolutions of splitting kernels and lower-order partonic cross sections to the order in epsilon needed for the full (NLO)-L-3 computation, as well as their expansions around the soft limit. We also discuss the size of the total scale uncertainty at (NLO)-L-3 that can be anticipated with existing information.