Construction of Designs
Gold is where you find it. The same is true of designs. There are many ways to construct designs all of which work some of the time. The most valuable tool is a group G of automorphisms. If the order of G is large this can make the construction easy. We can start with some part of the incidence matrix, say rows or columns, or with a subdesign.
KeywordsBinary Code Triple System Incidence Matrix Projection Matrix Steiner Triple System
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