The Osaka Journal of Mathematics is published quarterly by the joint editorship of the Departments of Mathematics of Osaka University and Osaka City University. Founded in 1964 as continuation of the two journals, the Osaka Mathematical Journal and the Journal of Mathematics, Osaka City University, the journal is devoted entirely to the publication of original works in pure and applied mathematics.

### Volume 31, Number 4

#### Publication Date: 1994

Miscellaneous front pages, Osaka J. Math., Volume 31, Number 4 (1994)

Katsuhiro Uno; 747-772

On $p$-radical groups $G$ and the nilpotency indices of $J(kG)$

Hiroshi Fukushima; 773-785

Moishezon fourfolds homeomorphic to $Q\sp 4\sb {\bf C}$

Iku Nakamura; 787-829

Nonisomorphic algebraic models of Nash manifolds and compactifiable $C\sp \infty$ manifolds

Tomohiro Kawakami; 831-835

Lagrangean contact structures on projective cotangent bundles

Masaru Takeuchi; 837-860

Minimal genus Seifert surfaces for special arborescent links

Makoto Sakuma; 861-905

The peripheral subgroup and the second homology of the group of a knotted torus in $S\sp 4$

Taizo Kanenobu and Ken-ichiro Kazama; 907-921

The Chern character of the symmetric space ${\rm SU}(2n)/{\rm SO}(2n)$

Takashi Watanabe; 923-938

Speed limit operators for oscillating speed functions

Berndt Fernow and Ulrich Krengel; 939-964

Ergodic properties of recurrent solutions of stochastic evolution equations

Bohdan Maslowski and Jan Seidler; 965-1003

Miscellaneous back pages, Osaka J. Math., Volume 31, Number 4 (1994)