17 citations · 35 across the 28 of their papers we have counts for
3 papers · 1 filter
Non-integral boundary slopes of alternating knots
Masaharu Ishikawa, Thomas W. Mattman, Koya Shimokawa
We show, for every positive integer , there is an alternating knot having a boundary slope with denominator . We make use of Kabaya's method for boundary slopes and the layer…
Positive flow-spines and contact 3-manifolds, II
Ippei Ishii, Masaharu Ishikawa, Yuya Koda +1
This paper corresponds to Section 8 of arXiv:1912.05774v3 [math.GT]. The contents until Section 7 are published in Annali di Matematica Pura ed Applicata as a separate paper. In th…
Distinguishing 2-knots admitting circle actions by fundamental groups
Mizuki Fukuda, Masaharu Ishikawa
A 2-sphere embedded in the 4-sphere invariant under a circle action is called a branched twist spin. A branched twist spin is constructed from a 1-knot in the 3-sphere and a pair o…