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132 views

Prove that $\lambda(v-1) = r(k-1)$

This is to do with balanced incomplete block design. Some homework exercise wants me to prove the relation $$\lambda(v-1) = r(k-1)$$ $v$ is the number of elements in your ground set. $r$ is the ...
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41 views

Decomposing $K_v - K_u$ into Hamilton paths where $v = u^2 - u + 1$.

A decomposition of a graph $G$ into subgraphs $H$ is a collection of graphs all isomorphic to $H$ which are edge-disjoint in $G$ and together cover all the edges of $G$. Let $u \geq 1$ and $v = u^2 ...
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529 views

fabric design using trigonometric functions

is there any trigonometric function or any others that involve trigonometric function, that draw cool fabric shapes or patterns? I have seen some pictures like but with trigonometric functions... ...
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197 views

perfect binary e-error correcting code

let C be a perfect binary e-error correcting code of length n. assume 0 is a symbol and that 0 vector is a codeword.show that P={1,2,...,n} together with supports of codewords of weight 2e+1form an ...