Hurwitz numbers for regular coverings of surfaces by seamed surfaces and Cardy-Frobenius algebras of finite groups;Equivariant complex structures on homogeneous spaces and their cobordism classes;On universality of critical behaviour in Hamiltonian PDEs;On the geometry of vee systems;Spectral conservation laws for periodic nonlinear equations of the Melnikov type;An equivariant version of the monodromy zeta function;Symplectic A}_\infty algebras and string topology operations;Differential forms and odd symplectic geometry;Abelian solutions of the KP equation;Deformations of the Whitham systems in the almost linear case;Frobenius manifolds as a special class of submanifolds in pseudo-Euclidean spaces;Integrability of the Gibbons-Tsarev system;2D Toda chain and associated commutator identity;On certain current algebras related to finite-zone integration