N. Tomar

activity

20222026

most citedCharacterizations and models for the

C_{1, r}

class and quantum annulus

1 citations · 1 across the 21 of their papers we have counts for

collaborators

Showing 2026 · math.FAShow all

4 papers · 2 filters

math.FA2026

Intertwining of $*$ -regular $q$ -isometric dilations

Nitin Tomar

A tuple $T = (T_{1}, \dots, T_{k})$ of contractions on a Hilbert space $H$ is said to be $q$ -commuting with $∥ q ∥ = 1$ if there exists a family of scalars $q=\{q_{ij}\i…

math.FA2026

Regular quantum annulus unitary dilation and applications

Nitin Tomar

Consider the annulus $A_{r} = {z \in C : r^{- 1} < ∣ z ∣ < r}$ for $r > 1$ and the quantum annulus \[ Q\mathbb{A}_r=\{T:\ T \text{ is an invertible operator and} \ \|T\|, \|T^{-…

math.FA2026

Rigidity of the structured singular value and applications

Sourav Pal, Nitin Tomar

The structured singular value $μ_{E}$ for a linear subspace $E$ of $M_{n} (C)$ is defined by \[ μ_E(A)=1 / \inf\{\|X\| \ : \ X \in E, \ \det(I_n-AX)=0 \} \quad (A \in M_n(\mathb…

math.FA2026

Spectral constants for the quantum annulus

Sourav Pal, James E. Pascoe, Nitin Tomar

We find several new estimates for the spectral constants $K (A_{r})$ for which a closed annulus $A_{r}$ or closed polyannulus $A_{r}^{n}$ is a…

Intertwining of ∗-regular q-isometric dilations

Regular quantum annulus unitary dilation and applications

Rigidity of the structured singular value and applications

Spectral constants for the quantum annulus

Intertwining of $*$ -regular $q$ -isometric dilations