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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">ANILLOS CONMUTATIVOS</topic></authority><related type="narrower"><topic>ANILLOS DE ARTIN</topic></related><related type="narrower"><topic>ANILLOS DE BUCHSBAUM</topic></related><related type="narrower"><topic>ANILLOS DE SERIES DE POTENCIA</topic></related><related type="narrower"><topic>ANILLOS LOCALES</topic></related><related type="narrower"><topic>ANILLOS NOETHERIANOS</topic></related><related type="narrower"><topic>ANILLOS POLINOMIALES</topic></related><related type="narrower"><topic>ANILLOS TOPOLOGICOS</topic></related><related type="narrower"><topic>GRUPO DE BRAUER</topic></related><related type="narrower"><topic>GRUPOS DE CLASE (MATEMATICAS)</topic></related><related type="narrower"><topic>TEORIA DE LA TORSION (ALGEBRA)</topic></related><related type="narrower"><topic>TEORIA DE RADICALES</topic></related><related type="broader"><topic>ANILLOS (ALGEBRA)</topic></related></mads>