## Vol 20 (1967)

#### Articles

 Some Results of Narrow Spectral Analysis. Yngve Domar 5-18
 Interpolation in Non-Quasi-Analytic Classes of Infinitely Differentiable Functions. Gösta Wahde 19-31
 An Asymptotic Formula for the Derivatives of Orthogonal Polynomials of the Unit Circle. Christian Hörup 32-40
 Boolean Operations on Graphs. Frank Harary, Gordon W. Wilcox 41-51
 Rings with Primary Ideals as Maximal Ideals. M. Satyanarayana 52-54
 Homological Dimensions of $\aleph_0$-Coherent Rings. Chr. U. Jensen 55-60
 Excision in Singular Theory. Egil Heistad 61-64
 Lp Estimates for (Pluri-) Subharmonic Functions. Lars Hörmander 65-78
 On the Relation $PQ -QP = -iI$. B. Fuglede 79-88
 Asymptotes of Convex Bodies. Victor Klee 89-90
 On Subgroups of the First Kind. N. Oler 91-92
 Extremely Amenable Semigroups II. E. Granirer 93-113
 On Evaluation of Higher Order Cohomology Operations. Leif Kristensen, Ib Madsen 114-130
 Cochain Functors for General Cohomology Theories I. A. Kock, L. Kristensen, I. Madsen 131-150
 Cochain Functors for General Cohomology Theories II. A. Kock, L. Kristensen, I. Madsen 151-176
 On the Stability of Linear Differential Equations in Spaces with an Indefinite Metric. B. Marksjö, Björn Textorius 177-192
 Classification and Deformation of Riemannian Spaces. Mitsuru Nakai, Leo Sario 193-208
 A Closure Problem for Spaces of Infinitely Differentiable Functions. Gösta Wahde 209-224
 Tauberian Problems for the $n$-Dimensional Laplace Transform II. Lennart Frennemo 225-239
 Some Applications of the Hilfssatz von Dedekind Mertens. Robert W. ,. Jr. Gilmer 240-244
 Note on Metrization and on the Paracompact $p$-Spaces of Arhangel'skiĭ. Per Roar Andenaes 245-248
 Differentiability of a Function and of its Compositions with Functions of One Variable. Jan Boman 249-268
 Remarks on the Irrationality and Transcendence of Certain Series. Wolfgang Schwarz 269-274
 On the Concept of Congruence Relation in Partial Algebras. G. Grätzer, G. H. Wenzel 275-280
 On the Theorem of Szegö-Solomentsev. Maurice Heins 281-289
 Characterizations of a Class of Convex Sets. Victor Klee, Czeslaw Olech 290-296
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