Deprecated: $wgMWOAuthSharedUserIDs=false is deprecated, set $wgMWOAuthSharedUserIDs=true, $wgMWOAuthSharedUserSource='local' instead [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/w/includes/HookContainer/HookContainer.php at line 135] in /var/www/html/w/includes/Debug/MWDebug.php on line 372
Almost-free groups in varieties with torsion - MaRDI portal

Almost-free groups in varieties with torsion (Q579408)

From MaRDI portal





scientific article; zbMATH DE number 4014987
Language Label Description Also known as
English
Almost-free groups in varieties with torsion
scientific article; zbMATH DE number 4014987

    Statements

    Almost-free groups in varieties with torsion (English)
    0 references
    0 references
    1987
    0 references
    A group G in a variety V of groups is said to be almost free in V if every subgroup of G which can be generated by fewer elements than the cardinality of G is contained in a V-free subgroup of G. In an earlier paper [J. Algebra 91, 36-52 (1984; Zbl 0569.20020)], the author showed that in every torsion-free variety V there is a non-free almost free group of cardinality \(\aleph_ n\) for each positive integer n. Here the same result is established for certain other varieties which may have torsion, namely those varieties which contain some finite non-abelian simple group.
    0 references
    varieties of groups
    0 references
    filtered presentations
    0 references
    V-free subgroup
    0 references
    non-free almost free group
    0 references

    Identifiers