JI Dong-hai, Lv De-jing, MA Ze-min. Covering the Boundary of Special Convex Bodies with Smaller Homothetic Copies[J]. 2019, 24(2): 115-120.DOI: 10.15938/j.jhust.2019.02.017.
For Hadwiger conjecture that the least number c(K) of translatesof the interior of K needed to cover K is at most 2n
according to the factthat c(K) equals the least number of smaller homothetic copies of K with thesame homothetic ratio needed to cover the boundary bdK of K
drawing on thecontinuous functional to estimate the value of c(K)
studying the problem ofestimating the value of the smallest homothetic ratio γm(K) that bdK can becovered by m translates of γm(K)K. The value of γ4(K) and γ8(K) when K is aregular tetrahedron
as well as the value of γ6(K)
γ7(K) and γ8(K) areobtained when K is a regular octahedron are obtained. It is proved that γ2n(K)=Γ2n(K)=Γ2n-1(D)when K is a cylinder in Rn with the n-1 dimensional convex set Das the base
where Γm(K) is the smallest value of the homothetic radio γ that Kcan be covered by m translates of γK..