M. M. Vaĭnberg

• Variational methods for the study of nonlinear operators
• Theory of branching of solutions of non-linear equations
• Variational method and method of monotone operators in the theory of nonlinear equations
• Teorii͡a︡ vetvlenii͡a︡ resheniĭ nelineĭnykh uravneniĭ
• Variat͡s︡ionnye metody issledovanii͡a︡ nelineĭnykh operatorov