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The Lévy continuity theorem for nuclear groups

W. Banaszczyk (1999)

Studia Mathematica

Let G be an abelian topological group. The Lévy continuity theorem says that if G is an LCA group, then it has the following property (PL) a sequence of Radon probability measures on G is weakly convergent to a Radon probability measure μ if and only if the corresponding sequence of Fourier transforms is pointwise convergent to the Fourier transform of μ. Boulicaut [Bo] proved that every nuclear locally convex space G has the property (PL). In this paper we prove that the property (PL) is inherited...

The Lie group of real analytic diffeomorphisms is not real analytic

Rafael Dahmen, Alexander Schmeding (2015)

Studia Mathematica

We construct an infinite-dimensional real analytic manifold structure on the space of real analytic mappings from a compact manifold to a locally convex manifold. Here a map is defined to be real analytic if it extends to a holomorphic map on some neighbourhood of the complexification of its domain. As is well known, the construction turns the group of real analytic diffeomorphisms into a smooth locally convex Lie group. We prove that this group is regular in the sense of Milnor. ...

The Lie groupoid analogue of a symplectic Lie group

David N. Pham (2021)

Archivum Mathematicum

A symplectic Lie group is a Lie group with a left-invariant symplectic form. Its Lie algebra structure is that of a quasi-Frobenius Lie algebra. In this note, we identify the groupoid analogue of a symplectic Lie group. We call the aforementioned structure a t -symplectic Lie groupoid; the “ t " is motivated by the fact that each target fiber of a t -symplectic Lie groupoid is a symplectic manifold. For a Lie groupoid 𝒢 M , we show that there is a one-to-one correspondence between quasi-Frobenius Lie algebroid...

The Lindelöf property and pseudo- 1 -compactness in spaces and topological groups

Constancio Hernández, Mihail G. Tkachenko (2008)

Commentationes Mathematicae Universitatis Carolinae

We introduce and study, following Z. Frol’ık, the class ( 𝒫 ) of regular P -spaces X such that the product X × Y is pseudo- 1 -compact, for every regular pseudo- 1 -compact P -space Y . We show that every pseudo- 1 -compact space which is locally ( 𝒫 ) is in ( 𝒫 ) and that every regular Lindelöf P -space belongs to ( 𝒫 ) . It is also proved that all pseudo- 1 -compact P -groups are in ( 𝒫 ) . The problem of characterization of subgroups of -factorizable (equivalently, pseudo- 1 -compact) P -groups is considered as well. We give some necessary...

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