Reconstructing a generalized quadrangle from the Penttila–Williford <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e22" altimg="si2.svg"><mml:mn>4</mml:mn></mml:math>-class association scheme

Reconstructing a Generalized Quadrangle from its Distance Two Association Scheme

Payne [4] constructed an association scheme from a generalized quadrangle with a quasiregular point. We show that an association scheme with appropriate parameters and satisfying an assumption about maximal cliques must be one of these schemes arising from a generalized quadrangle.

A Generalized Class of Psnr Sampling Scheme

In the present days of advanced electronic technologies in the field of communication like mobile phones, e-mail, internet etc. (and so forth) the incentive based mail surveys are being popular due to their cost effectiveness and rapid approach to individuals. But, a major disadvantage appears as mail surveys are affected by a huge amount of non-response of units in the sample. The post-stratif...

On a Four-class Association Scheme

The Code of a Regular Generalized Quadrangle of Even Order

The triangular extensions of a generalized quadrangle of order (3,3)

We show that the triangular extension of a generalized quadrangle of order (3,3) is unique. The proof depends upon certain computer calculations.