Designs and Finite Geometries

Front Matter

A Life’s Work in Geometry: An Homage to Hanfried Lenz

• Dieter Jungnickel, Günter Pickert

Impossibility of a Certain Cyclotomic Equation with Applications to Difference Sets

• K. T. Arasu, Alexander Pott

On the Binary Codes of Steiner Triple Systems

• Alphonse Baartmans, Ivan Landjev, Vladimir D. Tonchev

Orthogonal Partitions in Designed Experiments

• R. A. Bailey

Regulus-free Spreads of PG(3, q)

• R. D. Baker, G. L. Ebert

Designs, Codes and Crypts—A Puzzle Altogether

• Thomas Beth

5-Cycle Systems with Holes

• Darryn E. Bryant, D. G. Hoffman, C. A. Rodger

Stories about Groups and Sequences

• Peter J. Cameron

Groups Admitting a Kantor Family and a Factorized Normal Subgroup

• Dirk Hachenberger

Spreads in Strongly Regular Graphs

• Willem H. Haemers, Vladimir D. Tonchev

Codes Based on Complete Graphs

• Dieter Jungnickel, Marialuisa J. De Resmini, Scott A. Vanstone

A Construction of Partial Difference Sets in \( {\mathbb{Z}_{{{p^2}}}} \times {\mathbb{Z}_{{{p^2}}}} \times ... \times {\mathbb{Z}_{{{p^2}}}} \)

• Ka Hin Leung, Siu Lun Ma

On the Characterisation of AG(n, q) by its Parameters as a Nearly Triply Regular Design

• Arlene A. Pascasio, Cheryl E. Praeger, Blessilda P. Raposa

The Fundamental Theorem of q-Clan Geometry

• S. E. Payne

Extension of Gravity Centers Configuration to Steiner Triple Systems

• Günter Pickert

Constructions of Partial Difference Sets and Relative Difference Sets Using Galois Rings

• D. K. Ray-Chaudhuri, Qing Xiang

m-Systems and Partial m-Systems of Polar Spaces

• E. E. Shult, J. A. Thas

Piotrowski’s Infinite Series of Steiner Quadruple Systems Revisited

• Helmut Siemon