RT journal article T1 The classification question for Leavitt path algebras A1 Abrams, G. A1 Anh, P.N. A1 Louly, A. A1 Pardo Espino, Enrique A2 Matemáticas K1 Leavitt path algebra K1 Isomorphism K1 K-theory AB We prove an algebraic version of the Gauge-Invariant Uniqueness Theorem, a result which gives information about the injectivity of certain homomorphisms between ZZ-graded algebras. As our main application of this theorem, we obtain isomorphisms between the Leavitt path algebras of specified graphs. From these isomorphisms we are able to achieve two ends. First, we show that the K0K0 groups of various sets of purely infinite simple Leavitt path algebras, together with the position of the identity element in K0K0, classify the algebras in these sets up to isomorphism. Second, we show that the isomorphism between matrix rings over the classical Leavitt algebras, established previously using number-theoretic methods, can be reobtained via appropriate isomorphisms between Leavitt path algebras SN 0021-8693 YR 2008 FD 2008-01-01T00:00:00Z LK http://hdl.handle.net/10498/16095 UL http://hdl.handle.net/10498/16095 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-may-2026