|Integrability of the N=4 gauge theory and the Hubbard model|
shall explain how the all loop Bethe Ansatz conjectured by Beisert,
Dippel and Staudacher for the dilatation operator of the N=4 gauge
theory in the su(2) sector can be obtained as a reduction of the Bethe
Ansatz for an integrable short-ranged model of correlated fermions,
namelythe Hubbard model.