Victoria "Vi" Hart is an American mathematician and YouTuber. They describe themself as a "recreational mathemusician" and are well-known for creating mathematical videos on YouTube and popularizing mathematics. Hart founded the virtual reality research group eleVR and has co-authored several research papers on computational geometry and the mathematics of paper folding.

Matthew Thomas Parker is an Australian recreational mathematician, author, comedian, YouTube personality and science communicator based in the United Kingdom. His book Humble Pi was the first mathematics book in the UK to be a Sunday Times No. 1 bestseller. Parker was the Public Engagement in Mathematics Fellow at Queen Mary University of London. He is a former teacher and has helped popularise mathematics via his tours and videos.