Druzhkov Konstantin Pavlovich

Presentations in Math-Net.Ru

1. Invariant reduction for PDEs. III: Poisson brackets
   K. P. Druzhkov
   Cohomological geometry of differential equations
   November 12, 2025 19:20   
2. A non-trivial conservation law with a trivial characteristic
   K. P. Druzhkov
   Cohomological geometry of differential equations
   March 26, 2025 19:20   
3. Invariant reduction for PDEs. II: The general mechanism
   K. P. Druzhkov
   Cohomological geometry of differential equations
   March 5, 2025 19:20   
4. Invariant reduction for PDEs. I: Conservation laws of 1+1 systems of evolution equations
   K. P. Druzhkov
   Cohomological geometry of differential equations
   December 11, 2024 19:20   
5. Internal Lagrangians and gauge systems
   K. P. Druzhkov
   Cohomological geometry of differential equations
   May 1, 2024 19:20   
6. Internal Lagrangians as variational principles
   K. P. Druzhkov
   Cohomological geometry of differential equations
   September 20, 2023 19:20   
7. Lagrangian formalism and the intrinsic geometry of PDEs
   K. P. Druzhkov
   Cohomological geometry of differential equations
   April 5, 2023 19:20   
8. Extendable symplectic structures and the inverse problem of the calculus of variations for systems of equations written in an extended Kovalevskaya form
   K. P. Druzhkov
   Cohomological geometry of differential equations
   June 29, 2020 15:00   
9. Noether's theorem for diffeties
   K. P. Druzhkov
   Cohomological geometry of differential equations
   February 5, 2020 19:20
10. Generalization of the inverse problem of variational calculus. A complete solution. Part 2
    K. P. Druzhkov
    Cohomological geometry of differential equations
    November 27, 2019 19:20
11. Generalization of the inverse problem of variational calculus. A complete solution. Part 1
    K. P. Druzhkov
    Cohomological geometry of differential equations
    November 20, 2019 19:20