= José Manuel Marco
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<José Manuel Marco> coauthored the regularity theory of the Livšic <cohomological equation> with <Rafael de la Llave> and <Roberto Moriyón>. The official publisher record verifies this exact name.<Canonical perturbation theory of Anosov systems and regularity results for the Livsic cohomology equation by Rafael de la Llave and others (1986)>[Original byline]{ref}
Their work connects equations arising in <Anosov diffeomorphisms> and <Anosov flows> with regularity of their solutions. Solvability alone leaves a geometric question: does a transfer function inherit the smooth structure required by the application?
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