Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

I use earphones to listen to music. The cord connected to the earphones often gets entangled in my pocket and makes a knot, which I always find hard to untangle.

How can I define and calculate the probability that my cord spontaneously makes a knot?

Thank you.

share|improve this question
3  
    
Thanks so much, that's what I'm looking for. If you post your comment as an answer I'll accept it. –  pharmine Nov 8 '11 at 11:31

1 Answer 1

up vote 3 down vote accepted

Upon request I post my comment as an answer:

There is an interesting article on this topic by Dorian M. Raymer and Douglas E. Smith:

Spontaneous knotting of an agitated string

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.