  The brane-worlds model was inspired partly by Kaluza-Klein's theory, where
the gravitation and the gauge fields are obtained of a geometry of higher
dimension (bulk). Such a model has been showing positive in the sense of we
find perspectives and probably deep modifications in the physics, such as:
Unification in a scale TeV, quantum gravity in this scale and deviation of
Newton's law for small distances. One of the principles of this model is to
suppose a space-time embedded in a bulk of high dimension. In this note it is
shown, basing on the theorem of Collinson-Szekeres, that the space-time of
Schwarzschild cannot be embedded locally and isometrically in a bulk of five
dimensions with constant curvature,(for example ADS-5). From the point of view
of the semi-Riemannian geometry this last result consists constraints to the
model brane-world.
