🌐EnglishEnglishDeutschEspañolРусскийالعربية한국어中文日本語EntityQ4115796· pop 8· linked from 117 articlesLax pairMatrices satisfying a differential equationAvailable in 8 languagesEspañolDeutsch中文日本語Русскийالعربية한국어via Wikidata sitelinks · CC0Connectionssine–Gordon equationEntitymathematicsEntityCategoriesAutomorphic formsDifferential equationsExactly solvable modelsSpectral theory