V. Tsanov

activity

20152021

collaborators

4 papers

math.RT2021

On reductive subgroups of reductive groups having invariants in almost all representations

Valdemar Tsanov, Yana Staneva

Let $G$ and $G ~$ be connected complex reductive Lie groups, $G$ semisimple. Let $Λ^{+}$ be the monoid of dominant weights for a positive root system $Δ^{+}$ , and let $l (w)$ be th…

math.RT2018

Secant varieties and degrees of invariants

Valdemar V. Tsanov

The ring of invariant polynomials $C [V]^{G}$ over a given finite dimensional representation space $V$ of a complex reductive group $G$ is known, by a famous theorem of Hilb…

math-ph2017

Quantum marginals from pure doubly excited states

Tomasz Maciazek, Valdemar Tsanov

The possible spectra of one-particle reduced density matrices that are compatible with a pure multipartite quantum system of finite dimension form a convex polytope. We introduce a…

math.RT2015

On momentum images of representations and secant varieties

Elitza Hristova, Tomasz Maciazek, Valdemar V. Tsanov

Let $K$ be a connected compact semisimple group and $V_{λ}$ be an irreducible unitary representation with highest weight $λ$ . We study the momentum map $μ:\mathbb P(V_λ)\to\mathfrak…