We review several purely mathematical results concerning boundary value problems for nonlinear pseudodifferential equations for p-adic closed and open strings in the tree approximation in the case d = 1. For the solutions of these problems, we present formulas establishing the relations between the numbers of their zeros, the multiplicities of the zeros, and the numbers indicating how many times the solutions change sign.
机构:
Steklov Mathematical Institute, Russian Academy of Sciences, Gubkina str. 8, MoscowSteklov Mathematical Institute, Russian Academy of Sciences, Gubkina str. 8, Moscow