P. Popivanov

发表

Wave fronts of solutions of some classes of non-linear partial differential equations

P. Popivanov, 1992 .

A Degenerate Neumann Problem for Quasilinear Elliptic Equations

D. Palagachev, P. Popivanov, Kazuaki Taira, 2000 .

Singularities of the Solutions of Non-Correct Mixed Problems for Second Order Strictly Hyperbolic Operators

T. Gramchev, P. Popivanov, 1985 .

An application of subelliptic operators to the mixed problem for a second order hyperbolic equation

T. Gramchev, P. Popivanov, 1984 .

Existence of classical solutions of quasi-linear non-cooperative elliptic systems

Y. Markov, P. Popivanov, G. Boyadzhiev, 2017 .

Existence of classical solutions of quasi-linear non-cooperative elliptic systems

P. Popivanov, G. Boyadzhiev, Y. Markov, 2016, Journal of Pseudo-Differential Operators and Applications.

Boundary value problem with a tangential oblique derivative for second order quasilinear elliptic operators

D. Palagachev, P. Popivanov, 1993 .

Degenerating problem with directional derivative for quasilinear elliptic equations of second order

D. Palagachev, P. Popivanov, 1996 .

A NECESSARY CONDITION FOR ESTIMATES FOR THE ∂b-COMPLEX

M. Peloso, F. Nicola, M. Nacinovich, 2006 .

Airy operators and singular oblique derivative diffractive boundary value problems

T. Gramchev, P. Popivanov, 1986 .

On a nonstandard boundary value problem for the Laplace operator

A. Slavova, E. Litsyn, P. Popivanov, 2004 .

Communications of the Moscow Mathematical Society: Local Properties of Pseudodifferential Operators with Double Involutive Characteristics

P. Popivanov, 1978 .