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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Espacio y tiempo</topic></authority><related type="other"><topic>Espacio</topic></related><related type="other"><topic>Infinito</topic></related><related type="other"><topic>Cuarta dimensión</topic></related><related type="other"><topic>Tiempo</topic></related><related type="other"><topic>Relatividad (Física)</topic></related><related type="other"><topic>Hiperespacio</topic></related><related type="broader"><topic>Cosmología</topic></related><variant type="other"><topic>Espacio de más de tres dimensiones</topic></variant><variant type="other"><topic>Tiempo y espacio</topic></variant></mads>