Todor Gramchev

activity

20122021

collaborators

3 papers

math.AP2021

On some hyperbolic equations of third order

Ferruccio Colombini, Todor Gramchev, Nicola Orrù +1

We give sufficient conditions for the well-posedness in $C^{\infty}$ of the Cauchy problem for third order equations with time dependent coefficients.

math.FA2016

Anisotropic Shubin operators and eigenfunctions expansions in Gelfand-Shilov spaces

Marco Cappiello, Todor Gramchev, Stevan Pilipovic +1

We derive new results on the characterization of Gelfand--Shilov spaces $S_{ν}^{μ} (R^{n})$ , $μ, ν > 0$ , $μ + ν \geq 1$ by Gevrey estimates of the $L^{2}$ norms of iterates of $(m, k)$ …

math.AP2012

Decay estimates for solutions of nonlocal semilinear equations

Marco Cappiello, Todor Gramchev, Luigi Rodino

We investigate the decay for $∣ x ∣ \to \infty$ of weak Sobolev type solutions of semilinear nonlocal equations $P u = F (u)$ . We consider the case when $P = p (D)$ is an elliptic Fo…