🌐EnglishEnglishDeutschEspañolPortuguês日本語EntityQ17378628· pop 6· linked from 10 articlesGelfand-Levitan-Marchenko equationintegral equationAvailable in 6 languagesEspañol日本語AlbanianCatalanUkrainianvia Wikidata sitelinks · CC0ConnectionsInternational Standard Book NumberEntitydigital object identifierEntityCategoriesIntegral equationsScattering theory