## Divergence theorem on stratified spaces

It is very common in physics and engineering to apply the divergence theorem to compact spaces whose boundary is not smooth. For example, in the wikipedia link I just gave, the picture illustrating this very classic theorem shows a boundary of a 3D domain that is stratified (vertices are dimension 0, edges are of dimension … Read more

## Verifying a source that lacks a citation

In this German Mathematics Wikibook page, formula 0.5 lists the following equation ∫10sin(πx)xx(1−x)1−x dx=πe24 as supposedly attributed to Ramanujan (Google translate gives “formula by Ramanujan”). However, the page lacks a citation section, which is absolutely unfortunate, so I’m not certain whether to trust this source or not. How would I be able to verify the source … Read more