  We provide a determination of the Gottfried sum from all available data,
based on a neural network parametrization of the nonsinglet structure function
F_2. We find S_G=0.244 +- 0.045, closer to the quark model expectation S_G=1/3
than previous results. We show that the uncertainty from the small x region is
somewhat underestimated in previous determinations.

High Energy Physics - Phenomenology