L. Recht

activity

20082026

most citedPoncaré half-space of a C*-algebra

2 citations · 3 across the 8 of their papers we have counts for

collaborators

12 papers

math.FA2026

Graphs of operators as points in the Grassmann manifold

Esteban Andruchow, Lazaro Recht, Alejandro Varela

We study the set $Γ$ of graphs of closed, densely defined operators in a Hilbert space $H$ , regarded as a subset of the Grassmann manifold $P (H \times H)$ of orthogonal projections…

math.OA2025

The Riemann sphere of a C*-algebra

Esteban Andruchow, Gustavo Corach, Lázaro Recht +1

Given the unital C $^{*}$ -algebra $A$ , the unitary orbit of the projector $p_{0} = (1000)$ in the C $^{*}$ -algebra $M_{2} (A)$ of $2 \times 2$ matrices with…

math.FA2023

Conjugate points in the Grassmann manifold of a $C^{*}$ -algebra

Esteban Andruchow, Gabriel Larotonda, Lázaro Recht

Let $G r$ be a component of the Grassmann manifold of a $C^{*}$ -algebra, presented as the unitary orbit of a given orthogonal projection $G r = G r (P)$ . There are several natural connecti…

math.CV2023

Symmetries and reflections from composition operators in the disk

Esteban Andruchow, Gustavo Corach, Lázaro Recht

We study the composition operators $C_{a}$ acting on the Hardy space $H^{2}$ of the unit disk, given by $C_{a} f = f \circ φ_{a}$ , where $φ_{a} (z) = \frac{a - z}{1 - a ˉ z},$ for $∣ a ∣ < 1$ . These…

math.FA2019

A non commutative Kähler structure on the Poincaré disk of a C*-algebra

Esteban Andruchow, Gustavo Corach, Lázaro Recht

We study the Poincaré disk $\d=\{z\in\a: \|z\|<1\}$ of a C $^{*}$ -algebra $\a$ as a homogeneous space under the action of an appropriate Banach-Lie group $(˘ θ)$ of $2 \times 2$ matric…

math.FA2019

Supports for minimal hermitian matrices

Alberto Mendoza, Lázaro Recht, Alejandro Varela

We study certain pairs of subspaces $V$ and $W$ of $C^{n}$ we call supports that consist of eigenspaces of the eigenvalues $\pm ∥ M ∥$ of a minimal hermitian matrix $M$ ($\|M…