例句與造句

1. In three dimensions, the unknot cannot be written as the sum of two non-trivial knots.
2. It is an open problem whether any non-trivial knot has the same Jones polynomial as the unknot.
3. Another way to say this is that the pattern K'\ cup J is the connect-sum of a non-trivial knot K'with a Hopf link.
4. While you cannot form the unknot in three dimensions by adding two non-trivial knots, you can in higher dimensions, at least when one considers " smooth " knots in codimension at least 3.
5. If K'is a non-trivial knot in S ^ 3 and if a compressing disc for V intersects K'in precisely one point, then K is called a " connect-sum ."
6. It's difficult to find trivial knot in a sentence. 用trivial knot造句挺難的