One of my favourite areas of Maths. This was screenshot from recent a #Numberphile video (@bradyharan.bsky.social).
Have a look at 2014 video
www.youtube.com/watch?v=w-I6... and others, see how #Ramanujan summation is related to Riemann #ZetaFunction.
Also #Mathloger www.youtube.com/watch?v=YuII...