Mal'tsev and retral spaces

A space <em>X</em> is Mal&amp;apos;tsev if there exists a continuous map <em>M: X<sup>3</sup> → X </em> such that <em>M(x, y, y) = x = M(y, y, x)</em>. A space <em>X</em> is retral if it is a retract of a topological group. Every retral...

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Main Authors: Gartside, P, Reznichenko, E, Sipacheva, O
Format: Journal article
Language:English
Published: Elsevier 1997
Subjects:
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author Gartside, P
Reznichenko, E
Sipacheva, O
author_facet Gartside, P
Reznichenko, E
Sipacheva, O
author_sort Gartside, P
collection OXFORD
description A space <em>X</em> is Mal&amp;apos;tsev if there exists a continuous map <em>M: X<sup>3</sup> → X </em> such that <em>M(x, y, y) = x = M(y, y, x)</em>. A space <em>X</em> is retral if it is a retract of a topological group. Every retral space is Mal&amp;apos;tsev. General methods for constructing Mal&amp;apos;tsev and retral spaces are given. An example of a Mal&amp;apos;tsev space which is not retral is presented. An example of a Lindelöf topological group with cellularity the continuum is presented. Constraints on the examples are examined.
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spelling oxford-uuid:7c6d39b2-4818-43a4-a177-f4f76e4115142022-03-26T20:57:03ZMal'tsev and retral spacesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7c6d39b2-4818-43a4-a177-f4f76e411514Algebraic topologyEnglishOxford University Research Archive - ValetElsevier1997Gartside, PReznichenko, ESipacheva, OA space <em>X</em> is Mal&amp;apos;tsev if there exists a continuous map <em>M: X<sup>3</sup> → X </em> such that <em>M(x, y, y) = x = M(y, y, x)</em>. A space <em>X</em> is retral if it is a retract of a topological group. Every retral space is Mal&amp;apos;tsev. General methods for constructing Mal&amp;apos;tsev and retral spaces are given. An example of a Mal&amp;apos;tsev space which is not retral is presented. An example of a Lindelöf topological group with cellularity the continuum is presented. Constraints on the examples are examined.
spellingShingle Algebraic topology
Gartside, P
Reznichenko, E
Sipacheva, O
Mal'tsev and retral spaces
title Mal'tsev and retral spaces
title_full Mal'tsev and retral spaces
title_fullStr Mal'tsev and retral spaces
title_full_unstemmed Mal'tsev and retral spaces
title_short Mal'tsev and retral spaces
title_sort mal tsev and retral spaces
topic Algebraic topology
work_keys_str_mv AT gartsidep maltsevandretralspaces
AT reznichenkoe maltsevandretralspaces
AT sipachevao maltsevandretralspaces