From the 2 of 4 linked papers with an AI index.
4 papers
Fusion of boundary surface-link and ribbonness
Akio Kawauchi
The paper proves that a boundary surface‑link in the 4‑sphere is a ribbon surface‑link if performing surgery along a pairwise surgically nontrivial fusion 1‑handle system results i…
Quasi-ribbon but non-ribbon surface-link of trivial components
Akio Kawauchi
The paper defines quasi-equivalence for surface-links and introduces quasi-ribbon surface-links, proving that trivial-component surface-links are quasi-ribbon when they have at mos…
Orthogonal 2-sphere basis of stable 4-sphere
Akio Kawauchi
Every stable 4-sphere is identified with the double branched covering space of a trivial surface-knot space. As a result of Wall, it is known that any two orthogonal bases of every…
Free ribbon lemma for surface-link
Akio Kawauchi
A free surface-link is a surface-link whose fundamental group is a free group not necessarily meridian-based. Free ribbon lemma says that every free sphere-link in the 4-sphere is…