Ribbon 2-knots of ribbon crossing number four

Yasuda, T

Yasuda, T (reprint author), Nara Coll, Natl Inst Technol, Dept Liberal Studies, Nara 6391080, Japan.

JOURNAL OF KNOT THEORY AND ITS RAMIFICATIONS, 2018; 27 (10):

Abstract

A 2-knot is a surface in R-4 that is homeomorphic to S-2, the standard sphere in 3-space. A ribbon 2-knot is a 2-knot obtained from m 2-spheres in R-4......

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