Curriculum Vitae
Mathematics
Dirac's String Problem
Briefly, Dirac's String Problem is to explain mathematically why you can untwist a double twisting of loose (or elastic) strings with fixed ends without cutting it up, and why, on the other hand, you cannot do it with strings having only a single twisting.
The following presentation of Dirac's String Problem was given on a shopping bag celebrating the 500th anniversary of the University Library in Copenhagen.
Click on the images to view the front and the back of the shopping bag.
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To illustrate the movements of strings, I have animated the series of pictures on the back of the shopping bag. Like to see it?