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math.GT2007★ 1 cited
Ascending number of knots and links
Makoto Ozawa
We introduce a new numerical invariant of knots and links from the descending diagrams. It is considered to live between the unknotting number and the bridge number.
math.GT2007
Closed incompressible surfaces of genus two in 3-bridge knot complements
Makoto Ozawa
In this paper, we characterize closed incompressible surfaces of genus two in the complements of 3-bridge knots and links. This characterization includes that of essential 2-string…