State Lev Tolstoy Pedagogical University 1
1. A criterion for the unique solvability of the spectral Poincare problem for a class of multidimensional hyperbolic equations
2. Ill-posedness of the Tricomi problem for a multidimensional mixed hyperbolic-parabolic equation
3. Phases of semiclassical solutions of the two-dimensional massless Dirac equation with a constant electromagnetic field
4. The exact Jackson–Stechkin inequality in L2,μα
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