  In the paper we present an alternative approach to the boundedness of
Seshadri constants (which measure the local positivity) of nef and big line
bundles at a general point of a complex--projective variety. Our approach is
based on the construction of divisors in certain adjoint linear systems having
isolated singularities of high order. A variant of the method gives bounds for
Seshadri constants valid at arbitrary points of a smooth variety; these bounds,
however, depend on the line bundle and the positivity of the tangent bundle of
the variety in question.

Algebraic Geometry;Algebraic Geometry