On the existence of commutative Banach-Lie groups which do not admit continuous unitary representations
On the existence of compact-open prime ideals in compact totally disconnected semigroups.
On the foundations of k-group theory [Book]
On the foundations of Lie semigroups.
On the Frattini ideal in compact semigroups
On the generating functional of a convolution semigroup on a Hilbert-Lie group
On the Glicksberg theorem for locally quasi-convex Schwartz groups
We prove that every locally quasi-convex Schwartz group satisfies the Glicksberg theorem for weakly compact sets.
On the group of isometries of the Urysohn universal metric space
On the -topology in groups
On the infinite subsemigroups of a compact semigroup
On the intersection of the maximal ideals.
On the linearization theorem for proper Lie groupoids
We revisit the linearization theorems for proper Lie groupoids around general orbits (statements and proofs). In the fixed point case (known as Zung’s theorem) we give a shorter and more geometric proof, based on a Moser deformation argument. The passage to general orbits (Weinstein) is given a more conceptual interpretation: as a manifestation of Morita invariance. We also clarify the precise statements of the Linearization Theorem (there has been some confusion on this, which has propagated throughout...
On the nilpotent elements of semigroups
On the number of compact subsets in topological groups
On the poset of tensor products on the unit interval
On the Product of Two (Totally) Minimal Topological Groups and the Three-Space-Problem.
On the representations of certain idempotent topological semigroups.
On the -invariance property for -flows.
On the structure of certain po-semigroups.
On the structure of homogroups with applications to the theory of compact connected semigroups