## Vol 61 (1987)

#### Articles

 On extremal $h$-bases $A_4$. Svein Mossige 5-16
 Two-sheeted coverings of the disc. Frank Forelli 17-38
 Suites inertes dans les algèbres de Lie grasuées. ("Autopsie d'un meurtre II"). S. Halperin, J. -m. Lemaire 39-67
 Paracommutators of Schatten- von Neumann class $S_p$, $0 < p < 1$. Peng Lizhong 68-92
 Integral representations on convex semigroups. Paul Ressel 93-111
 The restriction algebra $A(\Gamma)$ for curves $\Gamma \subset \mathsf{R}^n$ Enji Sato 112-116
 Characterization of the predual and ideal structure of a JBW*-triple. Günther Horn 117-133
 A partial classification result for noncommutative tori. Klaus Thomsen 134-148
 M-structure in tensor products of Banach spaces. Dirk Werner 149-164
 On Euler's quartic surface. A. Bremner 165-180
 Maximally generated Cohen-Macaulay modules. J. P. Brennan, J. Herzog, B. Ulrich 181-203
 Algebraic and geometric approach to the classification of semispaces. Marek Lassak, Andrzej Prószynski 204-212
 Joins and higher secant varieties. Bjorn Adlandsvik 213-222
 Frobenius symbols for partitions and degrees of spin characters. Jorn B. Olsson 223-247
 R-torsion associated to infinite dimensional unitary representations. Howard D. Rees 248-261
 Smoothly symmetrizable hyperbolic systems of partial differential equations. Dale Clarke Hernquist 262-275
 On nonseperable simplex spaces. Wolfgang Lusky 276-285
 A spherical Fabricius-Bjerre formula with applications to closed space curves. Joel L. Weiner 286-291
 Classification of JBW*-triple factors and applications. T. Dang, Y. Friedmann 292-330
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