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What is On the finite geometry of $W(23,16)$ about?

We study the local geometry of the zero pattern of a weighing matrix $W(23,16)$. The geometry consists of $23$ lines and $23$ points where each line contains $7$ points. The incidence rules are that every two lines intersect in an odd number of points, and the dual statement holds as well. We show that more than $50\%$ of the pairs of lines must intersect at a single point, and construct a regular weighted graph out of this geometry. This might indicate that a weighing matrix $W(23,16)$ does not exist.

Author

Goldberger, Assaf

Published

2015

Language

EN