  If, as suggested by the SuperKamiokande results, the mu neutrino and tau
neutrino are maximally and ``rapidly'' mixed, this alone determines the mapping
from current to mass eigenstates up to one rotation angle (theta) mixing the
electron neutrino ``more slowly'', with an equal combination of the mu neutrino
and tau neutrino. For sin 2 theta = 1, the resulting minimal number of free
parameters, yet maximal mixing, shows agreement between extant observations of
solar neutrinos and predictions by the standard solar model with minor
modifications.
