Disk covering problem $r(7)$
The smallest value $r(7)$ such that $7$ disks of radius $r(7)$ can be arranged to cover the unit disk.
Value: $\frac{1}{2}$ (≈0.5)
Updates
-
Lower bound: $\frac{1}{2}$
(≈0.5)
Trivial or easy according to the secondary source.
[via Circles Covering Circles, Erich Friedman] -
Upper bound: $\frac{1}{2}$
(≈0.5)
Trivial or easy according to the secondary source.
[via Circles Covering Circles, Erich Friedman]