Maximizing the Sum of Superdiagonal Matrix Elements in Local Variational Problems with a Singular Integrand

We show that the extremum of the local variational problem with a singular nonlinear integrand found by the optimal path continuation procedure is in fact a local extremum. Conditions simplifying the search for a global extremum are identified. Translated from Prikladnaya Matematika i Informatika, No. 3, pp. 11–19, 1999.