45 citations · 198 across the 112 of their papers we have counts for
141 papers
Nullhomotopic equivariant shifts and Borsuk-Ulam-compatible compact abelian groups
Alexandru Chirvasitu, Alexander Dąbrowski
We disprove the classical version of the Borsuk-Ulam-flavored conjecture, due to Baum-D{ą}browski-Hajac, that free actions on non-empty compact Hausdorff…
Weak polynomial density, diffuseness and proper infinitude
Alexandru Chirvasitu
The unitary group of a von Neumann algebra on an -dimensional Hilbert space is polynomially weak-dense (equivalently, dense or residual) in the normal uni…
Quantum Hopf rigidity in symmetric monoidal categories
Alexandru Chirvasitu
We prove that a coaction of a Hopf algebra on another preserving the latter's associative-algebra structure and comultiplication automatically also preserves the counit, antipode,…
Ergodic-transformation centralizers and essentially non-compact graphing symmetry
Alexandru Chirvasitu
We prove that for every ergodic transformation on an infinite standard probability space both the automorphism group (i.e. centralizer) and its reversing auto…
Associative/Lie radical (co)invariance under tracial (co)actions
Alexandru Chirvasitu
We prove a number of Jacobson/solvable/nilpotent-radical (co)invariance results for finite-dimensional associative or Lie (co)module-algebras over Hopf algebras , provided the c…
Coincident Poisson structures on principal-bundle moduli spaces
Alexandru Chirvasitu
Consider a reductive complex algebraic group equipped with an action by a linearly reductive affine group scheme . The extension of by $\m…