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Currently displaying 1 – 2 of 2

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A cancellative amenable ascending union of nonamenable semigroups

John Donnelly — 2011

Czechoslovak Mathematical Journal

We construct an example of a cancellative amenable semigroup which is the ascending union of semigroups, none of which are amenable.

The group ring $𝕂 F$ of Richard Thompson’s Group $F$ has no minimal non-zero ideals

John Donnelly — 2019

Archivum Mathematicum

We use a total order on Thompson’s group $F$ to show that the group ring $𝕂 F$ has no minimal non-zero ideals.

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