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    • Semigroups of singular endomorphisms of vector space 

      Dawlings, Robert J. H. (University of St Andrews, 1980) - Thesis
      In 1967, J. A. Erdős showed, using a matrix theory approach that the semigroup Sing[sub]n of singular endomorphisms of an n-dimensional vector space is generated by the set E of idempotent endomorphisms of rank n - 1. This ...