Results 11 to 20 of about 289,513 (282)

Free Boolean Topological Groups [PDF]

open access: yesAxioms, 2015
Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given.
Ol’ga Sipacheva
doaj   +4 more sources

The character of free topological groups I

open access: yesApplied General Topology, 2005
A systematic analysis is made of the character of the free and free abelian topological groups on uniform spaces and on topological spaces. In the case of the free abelian topological group on a uniform space, expressions are given for the character in ...
Peter Nickolas, Mikhail Tkachenko
doaj   +9 more sources

On-chip topological edge state cavities [PDF]

open access: yesLight: Science & Applications
Confining light in an on-chip photonic cavity with strong light-matter interactions is pivotal for numerous applications in optical and quantum sciences.
Wenhao Wang   +4 more
doaj   +2 more sources

Topological Silicon Photonics

open access: yesAdvanced Photonics Research, 2021
The field of topological photonics has seen tremendous and wide‐ranging developments in recent years. Evolving from the broader field of topological insulators, topological photonics systems today harness a variety topological phases.
Dawn T. H. Tan
doaj   +1 more source

Real-space construction of crystalline topological superconductors and insulators in 2D interacting fermionic systems

open access: yesPhysical Review Research, 2022
The construction and classification of crystalline symmetry protected topological (SPT) phases in interacting bosonic and fermionic systems have been intensively studied in the past few years. Crystalline SPT phases are not only of conceptual importance,
Jian-Hao Zhang   +3 more
doaj   +1 more source

Free Topological Groups [PDF]

open access: yesIrish Mathematical Society Bulletin, 1961
The purpose of this paper is to provide a brief expository sketch of [Proc. Am. Math. Soc. 12, 737-743 (1961; Zbl 0106.026)].
openaire   +3 more sources

Separability of Topological Groups: A Survey with Open Problems

open access: yesAxioms, 2018
Separability is one of the basic topological properties. Most classical topological groups and Banach spaces are separable; as examples we mention compact metric groups, matrix groups, connected (finite-dimensional) Lie groups; and the Banach spaces ...
Arkady G. Leiderman, Sidney A. Morris
doaj   +1 more source

Big Free Groups are Almost Free [PDF]

open access: yes, 2015
It is shown that the big free group (the set of countably-long words over a countable alphabet) is almost free, in the sense that any function from the alphabet to a compact topological group factors through a homomorphism.
Tlas, Tamer
core   +3 more sources

Strengthening connected Tychonoff topologies

open access: yesApplied General Topology, 2002
The problem of whether a given connected Tychonoff space admits a strictly finer connected Tychonoff topology is considered. We show that every Tychonoff space X satisfying ω (X) ≤ c and c (X) ≤ N0 admits a finer strongly σ-discrete connected Tychonoff ...
Dimitri Shakhmatov   +3 more
doaj   +1 more source

Tensor renormalization group study of two-dimensional U(1) lattice gauge theory with a θ term

open access: yesJournal of High Energy Physics, 2020
We make an analysis of the two-dimensional U(1) lattice gauge theory with a θ term by using the tensor renormalization group. Our numerical result for the free energy shows good consistency with the exact one at finite coupling constant.
Yoshinobu Kuramashi, Yusuke Yoshimura
doaj   +1 more source

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