N. Teofanov

activity

20242026

collaborators

5 papers

math.AP2026

Continuity properties of the Laguerre operator and its propagator

Smiljana JakÅ¡iÄ, Nenad Teofanov, ÄorÄe VuÄkoviÄ

We study the well-posedness of a Cauchy problem associated with the general form of the Laguerre operator and relate it to the corresponding global problem for the harmonic oscilla…

math.FA2026

Compactness for pseudo-differential and Toeplitz operators on modulation spaces

Elmira Nabizadeh-Morsalfard, Christine Pfeuffer, Nenad Teofanov +1

We deduce various norm equivalences, and convolution estimates for the modulation space $M_{(I ¨ )}^{♯, q}$ consisting of all $f \in M_{(I ¨ )}^{\infty, q}$ such that $|V_Ïf \cdot…

math.FA2025

Gelfand-Shilov spaces for extended Gevrey regularity

Nenad Teofanov, Filip Tomic, Milica Zigic

We consider spaces of smooth functions obtained by relaxing Gevrey-type regularity and decay conditions. It is shown that these classes fit well within the general framework of the…

math.FA2025

Norm estimates for a broad class of modulation spaces, and continuity of Fourier type operators

Joachim Toft, Christine Pfeuffer, Nenad Teofanov

Let $B$ be a normal quasi-Banach function space with respect to $r_{0} \in (0, 1]$ and $v_{0}$ , $I ¨ $ be $v$ -moderate, and let $r \in [r_{0}, \infty]$ . Then we prove that $f$ belon…

math.FA2024

Ultradifferentiable functions via the Laguerre operator

Smiljana JakÅ¡iÄ, Stevan PilipoviÄ, Nenad Teofanov +1

We define and characterize ultradifferentiable functions and their corresponding ultradistributions on $\RR^d_+$ using iterates of the Laguerre operator. The characterization is ba…