Packing unit squares in a square $s(26)$
The side of the smallest square into which $26$ unit squares can be packed.
Lower bound:
$2\sqrt{2}+\frac{27+2\sqrt{10}}{13}$
(≈5.391854)
Upper bound:
$\frac{7}{2}+\frac{3\sqrt{2}}{2}$
(≈5.62132)
Updates
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Upper bound: $\frac{7}{2}+\frac{3\sqrt{2}}{2}$
(≈5.62132)
Reference unknown
[via Packing Unit Squares in Squares: A Survey and New Results, Erich Friedman, 2009-08-14] -
Lower bound: $2\sqrt{2}+\frac{27+2\sqrt{10}}{13}$
(≈5.391854)
Reference unknown
[via Packing Unit Squares in Squares: A Survey and New Results, Erich Friedman, 2009-08-14]