🌐EnglishEnglishEspañolItalianoTiếng ViệtРусский한국어中文日本語EntityQ3813244· pop 10· linked from 32 articlesBogoliubov transformationAvailable in 10 languagesEspañol中文日本語РусскийItalianoCatalanTiếng ViệtUkrainian한국어via Wikidata sitelinks · CC0ConnectionsNikolai BogolyubovEntitycreation and annihilation operatorsEntityCategoriesQuantum field theory