Alexandru Chirvasitu

collaborators

4 papers

math.GR2026

Action principality as a Lie-group certificate

A continuous action $G ↻ X$ of a topological group is principal if its isotropy groups are all conjugate to $H \leq G$ and the quotient map…

math.AT2026

Equivariant compactifications, trivial embeddability and finite type

Alexandru Chirvasitu

We characterize finite-type $G$ -principal $U$ -equivariant bundles on normal $U$ -spaces for compact Lie groups $U$ and $G$ , in several w…

math.FA2026

Spectral finiteness, quantum norm continuity and classical points

Alexandru Chirvasitu

We prove various notions of uniform continuity for compact-quantum-group representations on Hilbert or Banach spaces equivalent to having finite spectrum, i.e. finitely many isotyp…

math.OA2026

Banach manifolds of spectrally small quantum-group representations

Alexandru Chirvasitu

We prove that finite-spectrum representations of compact quantum groups either in unital $C^{*}$ -algebras $A$ or on Banach spaces $E$ exhibit the same Banach-space-modeled differenti…