User blog comment:Ynought/Hyper extended array hierarchy/@comment-35470197-20190129040854/@comment-36957202-20190131123959

Well i think this is best ecplanied like this:

if the array at the bottom of the leftarrow is i.e. (10,10,10,10) then it turns into (10+E_9,10+E_9,10+E_9,9)