1. Norms from quadratic fields and their relation to noncommuting 2×2 matrices III. A link between the 4-rank of the ideal class groups inQ \((\sqrt m )\) and inQ \((\sqrt { - m} )\)

   • Olga Taussky

   OriginalPaper Pages: 91 - 95

2. Die Unterebenen der freien symmetrischen Ebenen (II)

   • Erich Glock

   OriginalPaper Pages: 97 - 101

3. The faithful linear representations of least degree ofS _n andA _n over a field of odd characteristic

   • Ascher Wagner

   OriginalPaper Pages: 103 - 114

4. Functions of binomial type mapping groupoids into rings

   • János Aczél

   OriginalPaper Pages: 115 - 124

5. 4-dimensionale Translationsebenen mit kommutativer Standgruppe

   • Dieter Betten

   OriginalPaper Pages: 125 - 141

6. Blocks with dihedral defect groups in solvable groups

   • Karin Erdmann
   • Gerhard O. Michler

   OriginalPaper Pages: 143 - 151

7. A combinatorial lemma

   • Bernhard Ganter
   • Luc Teirlinck

   OriginalPaper Pages: 153 - 156

8. On ternary rings of derivable planes

   • Judita Cofman

   BriefCommunication Pages: 157 - 158

9. Zur Geometrie der Frobeniusgruppen

   • Johannes André

   OriginalPaper Pages: 159 - 168

10. Eine Charakterisierung der (i, j)-Pläne

    • Karl Erich Wolff

    OriginalPaper Pages: 169 - 173

11. The lattice of kernel operators and topological algebra

    • Karl H. Hofmann
    • Michael W. Mislove

    OriginalPaper Pages: 175 - 188

12. (r ⁿ⁻¹ ,r) Hjelmslev-Ebenen des Typsn

    • Günter Törner

    OriginalPaper Pages: 189 - 201