Mathematics – Rings and Algebras
Scientific paper
2007-12-16
Mathematics
Rings and Algebras
23 pages; amstex; 3 xypic figures
Scientific paper
An introduction to Leavitt path algebras of arbitrary directed graphs is presented, and direct limit techniques are developed, with which many results that had previously been proved for countable graphs can be extended to uncountable ones. Such results include characterizations of simplicity, characterizations of the exchange property, and cancellation conditions for the K-theoretic monoid of equivalence classes of idempotent matrices.
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