## Vol 45 (1979)

#### Articles

 A note on reflection. Dag Normann 5-12
 Harmonic maps from surfaces to certain Kaehler manifolds. Domingo Toledo 13-26
 Whitney (b)-regularity is weaker than Kuo's ratio test for real algebraic stratifications. Hans Brodersen, David Trotman 27-34
 On extensions of locally compact groups and unitary groups. Esben T. Kehlet 35-49
 A remark on singular supports of convolutions. Lars Hörmander 50-54
 The Levi problem in Stein spaces. John Erik Fornaess 55-69
 A Carleman theorem for curves in $\mathsf{C}^n$ H. Alexander 70-76
 Imbedding theorems of Sobolev type in potential theory. Kurt Hansson 77-102
 Sur la reproductibilite des espaces $l_p$ C. Samuel 103-117
 Spectral theory for facially homogenous symmetric self-dual cones. Jean Bellisard, Bruno Iochum 118-126
 Positive projections and Jordan structure in operator algebras. Edward G. Effros, Erling Stormer 127-138
 Universally weakly inner one-parameter automorphism groups of seperable $C^*$-algebras. George A. Elliot 139-146
 Cebysev subspaces of $C^*$-algebras. Gert Kjaergard Petersen 147-156
 A classification of ideals in crossed products. Dorte Olesen 157-167
 Über Lipschitz-Folgen. G. J. Rieger 168-176
 Proof of the quadratic reciprocity law in primitive recursive arithmetic. W. J. Ryan 177-197
 Almost Artinian modules. James Hein 198-204
 Deformations of graded algebras. Jan O. Kleppe 205-231
 Local structure of the zero-sets of differentiable mappings and application to bifurcation theory. Andrzej Szulkin 232-242
 Hyperbolic Hardy class $H^1$ Shinji Yamashita 261-266
 Crossed products of $C^*$-algebras by approximately uniformly continous actions. Gert K. Pedersen, Hiroshi Takai 282-288