ABSTRACT
The partial differential equation https://www.w3.org/1998/Math/MathML"> ∂ u x , t ∂ t = D ∂ 2 u x , t ∂ x 2 , https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003178972/2df7c31e-87d5-4311-9568-69acef9e9d55/content/math12_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
