Mobile Phone IMEI Numbers: What are they and how do they work? - Gresham College maths lecture скачать в хорошем качестве

Mobile Phone IMEI Numbers: What are they and how do they work? - Gresham College maths lecture

Every mobile phone has a unique reference number to ensure that it's not stolen. But what are these IMEI numbers and how do they work? In this extract from his lecture on Codebreaking in Everyday Life, John D. Barrow, Gresham Professor of Geometry and Professor of Mathematical Science at the University of Cambridge, explains the maths behind this piece of code we find in our everyday lives. This is the 12th part of 'Codebreaking in Everday Life'. The full lecture is available (in 13 parts) here on YouTube, or it can be downloaded (like all of our lectures) in its complete form from the Gresham College website, in video, audio or text formats: http://www.gresham.ac.uk Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website.