Watch me and https://www.youtube.com/channel/UC4zzTEL5tuIgGMvzjk1Ozbg explore the Multiverse Library here: https://www.youtube.com/watch?v=f8C8hlAmdVc. This video explains the maths used to create the Multiverse Library, namely branch cuts and multifunctions. Featuring Oxford Mathematician Dr Tom Crawford and Dr Henry Segerman of Oklahoma State University. The main maths content of the video focuses on defining a holomorphic branch of the complex logarithm, which is exemplified by looking at the complex square root function. Multifunctions are usually covered in a Complex Analysis course at university. Watch “Peace for Triple Piano” with https://www.youtube.com/channel/UCOGeU-1Fig3rrDjhm9Zs_wg here: https://www.youtube.com/watch?v=HcRW3FMuttY Library footage filmed at St Edmund Hall, University of Oxford. Produced by Dr Tom Crawford at the University of Oxford. Tom is an Early-Career Teaching and Outreach Fellow in Mathematics at St Edmund Hall: https://www.seh.ox.ac.uk/people/tom-crawford For more maths content check out Tom's website https://tomrocksmaths.com/ You can also follow Tom on Facebook, Twitter and Instagram @tomrocksmaths. https://www.facebook.com/tomrocksmaths/ https://twitter.com/tomrocksmaths https://www.instagram.com/tomrocksmaths/ Get your Tom Rocks Maths merchandise here: https://beautifulequations.net/collections/tom-rocks-maths