  We discuss methods for the calculation of the total partonic Higgs boson
production cross section via gluon fusion and the result for the contribution
that stems from two quarks of different flavor in the initial state. Our
calculation is exact in the Higgs boson mass and the partonic center-of-mass
energy. The result is expressed in terms of iterated integrals, some of which
are Harmonic Polylogarithms, whereas others are new iterated integrals. We
comment on the methods relevant for the reduction to scalar integrals and new
types of function that appear in the final result.
