Browsing Department of Mathematics by Subject "Blocks"

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    • Group Divisible Design (4, n, n + 1, 4; λ1, λ2), for n ≥ 4 

      Tomanya, Balaam; Namyalo, Kasifa (IOSR Journal of Mathematics (IOSR-JM), 2021)
      This work is about Group Divisible Designs (GDDs) of block size four on three groups of different sizes n1 = 4, n2 = n and n3 = n + 1 where n ≥ 4. We first establish necessary conditions for the existence of the GDD using ...