A. A. Dezin

• Different͡sialʹno-operatornye uravnenii͡a
• Multidimensional analysis and discrete models
• Partial differential equations
• Differential operator equations
• Invariantnye different︠s︡ial'nye operato granichnye zadachi
• Mnogomernyĭ analiz i diskretnye modeli
• Obshchie voprosy teorii granichnykh zadach
• Uravnenii︠a︡, operatory, spektry