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Having looked at the infinite in philosophical and theological terms, it’s time to view it through the lens of mathematics. Adrian Moore introduces us to the pivotal role mathematics has played in the quest to understand the infinite. He begins by enlisting the help of very modern technology and considering the real question put by an 11 year old boy - what is zero divided by zero? That’s the trigger for Adrian’s investigation of the calculus – the tool we use to reckon with very small quantities. It plays a huge part in many aspects of modern-day design, medicine and statistical work. However, what is less well-known is the 17th century row between two eminent scientists as to who actually invented it. Adrian meets science writer, Brian Clegg, to find out about the race to claim credit. It didn’t just cause a storm at its inception - we hear about the disagreements that dogged the calculus’s early days, with the church too getting involved in the disputes about the infinitely small. But as Adrian discovers, the quest to understand the infinite has left us with a branch of mathematics of unparalleled importance. Producer: Philippa Goodrich A Juniper production for Â鶹Éç Radio 4, first broadcast in September 2016.