🌐EnglishEnglishFrançais中文日本語EntityQ7560453· pop 6· linked from 5 articlesSommerfeld expansionintegral approximation method popular in condensed matter physicsAvailable in 6 languagesFrançais中文日本語CatalanHebrewvia Wikidata sitelinks · CC0ConnectionstemperatureEntityInternational Standard Book NumberEntityCategoriesEquations of physicsParticle statisticsStatistical mechanics