Inverse Semigroups Generated by Linear Transformations

S. Mendes-Goncalves, Robert Sullivan

    Research output: Contribution to journalArticle

    Abstract

    Suppose X is a set with |X| = p ≥ q ≥ 0 and let B = BL(p, q) denote the Baer-Levi semigroup defined on X. In 1984, Howie and Marques-Smith showed that, if p = q, then BB−1 = I(X), the symmetric inverse semigroup on X, and they described the subsemigroup of I(X) generated by B−1B. In 1994, Lima extended that work to ‘independence algebras’, and thus also to vector spaces. In this paper, we answer the natural question: what happens when p > q? We also show that, in this case, the analogues BB−1 for sets and GG−1 for vector spaces are never isomorphic, despite their apparent similarities.
    Original languageEnglish
    Pages (from-to)205-213
    JournalBulletin of the Australian Mathematical Society
    Volume71
    Issue number2
    DOIs
    Publication statusPublished - 2005

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