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Mean-field calculations of fluctuations in nuclear collisions.

We apply the new variational principle of Balian and Veneroni to calculate the fluctuations in final-fragment mass, charge, and kinetic energy for the systems 16O + 16O (Elab-160 MeV) and 40Ca + 40Ca (Elab=278 MeV). The calculated fluctuations are larger than conventional time-dependent Hartree-Fock results and, in the latter case, are consistent with the experimental fragment mass distribution.