🌐EnglishEnglishEspañolFrançaisPortuguêsРусскийفارسیहिन्दी中文日本語EntityQ6510183· pop 18· linked from 108 articlesdiffusion equationequation that describes density changes of a material that is diffusing in a mediumAvailable in 18 languagesEspañolFrançais中文日本語РусскийPortuguêsहिन्दीBanglaCatalanCroatianConnectionsFick's laws of diffusionEntityInternational Standard Book NumberEntityCategoriesDiffusionFunctions of space and timeParabolic partial differential equationsPartial differential equations