Fragment flow in Au+Au collisions.

Exclusive measurements have been made of Au+Au reactions with beam energies ranging from 0.25{ital A} to 1.15{ital A} GeV. We present measurements of directed collective flow averaged over all light fragments with masses up to alphas, as well as separate measurements for protons, deuterons, tritons, {sup 3}He, {sup 4}He, and Li. The results show a strong increase of the directed flow with fragment mass at all energies measured. Experimental results are compared with a quantum molecular dynamics model. We find that neither the ``soft`` nor the ``hard`` equation of state can describe the data over the entire range of beam energies.