## Vol. 6 (1999) No. 04

Journal of Mathematical Sciences The University of Tokyo

1. Funar, Louis ; Gelca, R\u azvan
On the Groupoid of Transformations of Rigid Structures on Surfaces
Vol. 6 (1999), No. 4, Page 599--646.

2. Malle, Gunter
On the Rationality and Fake Degrees of Characters of Cyclotomic Algebras
Vol. 6 (1999), No. 4, Page 647--677.

3. Li, Simin
A Criterion for an Interval Exchange Map to be Conjugate to an Irrational Rotation
Vol. 6 (1999), No. 4, Page 679--690.

4. Saeki, Osamu
Theory of Fibered 3-Knots in $S^5$ and its Applications
Vol. 6 (1999), No. 4, Page 691--756.