Oleinik, Olga; Petrovskii, I.G.; Yosifan, G.A.

• Petrowsky's Articles on Partial Differential Equations 1. On the Cauchy Problem for Systems of Partial Differential Equations 2. On the Cauchy Problem for Linear Systems of Partial Differential Equations in Classes of Non-analytic Functions 3. On the Cauchy Problem in Classes of Non-analytic Functions 4. On the Analyticity of Solutions of Systems of Partial Differential Equations 5. On the Diffusion of Waves and the Lacunas for Hyperbolic Systems 6. On the Diffusion of Waves and the Lacunas for Hyperbolic Equations Petrowsky's Articles on Algebraic Topology 7. On the Topology of Real Plane Algebraic Curves 8. On the Topology of Real Algebraic Surfaces