<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>6968</termId><termName>Ecuaciones diferenciales</termName><termType>PT</termType><termLanguage>es</termLanguage><termVocabulary>INDICES DE MATERIAS</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Ecuaciones diferenciales</termSortkey><termNote label="Source"><![CDATA[ <p>CDU: 517.9</p> ]]></termNote><termCreatedDate>Ecuaciones diferenciales</termCreatedDate><relation><relationType>UF</relationType><termId>7368</termId><termName>Ecuaciones diferenciales hipergeométricas</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>6925</termId><termName>Área 07. Ecuaciones</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7376</termId><termName>Lagrange, Ecuaciones de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7377</termId><termName>Laplace, Transformación de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7378</termId><termName>Liapounov, Funciones de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7379</termId><termName>Operadores diferenciales</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7016</termId><termName>Potencial, Teoría del</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7349</termId><termName>Problemas de contorno</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7380</termId><termName>Problemas de los valores iniciales</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7381</termId><termName>Problemas de los valores iniciales - Soluciones numéricas</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7382</termId><termName>Problemas inversos (Ecuaciones diferenciales)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7383</termId><termName>Sturm-Liouville, Ecuación de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7207</termId><termName>Superficies (Matemáticas)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7384</termId><termName>Transformaciones infinitesimales</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7385</termId><termName>Weber, Funciones de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7365</termId><termName>Bessel, Funciones de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>6985</termId><termName>Cálculo infinitesimal</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>6953</termId><termName>Cálculo integral</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>6957</termId><termName>Funciones (Matemáticas)</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7369</termId><termName>Cálculo simbólico</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7370</termId><termName>Dinámica diferenciable</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7371</termId><termName>Ecuaciones de evolución</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7372</termId><termName>Ecuaciones de evolución no lineales</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7373</termId><termName>Ecuaciones integrodiferenciales</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7374</termId><termName>Green, Funciones de</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>7375</termId><termName>Grupos continuos</termName><termType>PT</termType></relation></term>  </Zthes>