\input zb-basic
\input zb-matheduc
\iteman{ZMATH 2010b.00570}
\itemau{Gebhardt, Olav; Overholt, Marius}
\itemti{A combinatorial curiosity. (Et kombinatorisk kuriosum.)}
\itemso{Normat. 57, No. 4, 170-172 (2009).}
\itemab
Summary: Given $n$ strands of black and white pearls, each of length $k$. Assume that each pair of strands agree in at least $m$ more positions than they disagree, and that at each position the excess number of pearls of one color over the other across the strands is at most $d$. The authors find a necessary condition on $n,k,m$ and $d$, and prove it both combinatorially and by linear algebra.
\itemrv{~}
\itemcc{K25}
\itemut{}
\itemli{}
\end