  An effective estimate for the lattice point discrepancy of ellipsoids of
rotation. This paper provides an explicit bound, with numerical constants, for
the lattice point discrepancy (= number of integer points minus volume) of an
ellipsoid Q < x, where Q is a positive definite ternary quadratic form,
diagonalized and invariant with respect to rotations around one coordinate
axis. In the result the exponent of x in the leading term is equal to 11/16.

Number Theory;Classical Analysis and ODEs