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Jan 19, 2016 at 11:55 vote accept Rick Rothenberg
Jan 18, 2016 at 23:55 history edited Douglas Zare CC BY-SA 3.0
Removed extra stuff about satellite knots.
Jan 18, 2016 at 23:34 history edited Douglas Zare CC BY-SA 3.0
added 288 characters in body
Jan 18, 2016 at 23:23 comment added Douglas Zare @JimConant: By meridianal disk, I meant topological meridianal disk.
Jan 18, 2016 at 23:23 comment added Ryan Budney Oh, okay. But readers should be aware that your defnition is a special case of the ones you see in the original articles (Schubert) as well as most textbooks and research articles that use the notion.
Jan 18, 2016 at 23:18 comment added Jim Conant You need to say it a bit more strongly than how you did it, Douglas, since you could take a messy embedding of the knot into the torus which is still isotopic to one that meets some disk in one or zero points.
Jan 18, 2016 at 23:05 comment added Douglas Zare @Ryan Budney: Yes, that's one definition, but I don't like that one. I said that the meridianal disk has to intersect the knot at least twice, which I think rules out connected sums and gives a $\pi_1$-injective torus.
Jan 18, 2016 at 22:36 comment added Ryan Budney All satellite knots are prime.... except for the ones that are not! :) Connect-sums are satellite knots, and they are not prime.
Jan 18, 2016 at 22:31 history answered Douglas Zare CC BY-SA 3.0