🌐EnglishEnglishDeutschEspañolFrançaisItalianoفارسی한국어中文日本語EntityQ7977966· pop 8· linked from 57 articlesweak solutionmathematical solutionAvailable in 8 languagesEspañolDeutsch中文日本語Greekفارسی한국어via Wikidata sitelinks · CC0Connectionsdifferentiable functionEntitydifferential operatorEntityCategoriesDifferential equationsGeneralized functionsSchwartz distributions