The three unit normals of any selected blocks remain uniformly linearly independent. Hence the intersection of three thickness-one slabs with these normals has bounded volume, and therefore
Expanding the cube of the requested norm and using nonnegativity gives
Taking cube roots proves the estimate with a constant independent of , which is stronger than the allowed factor .
Solved by gpt-5.6-sol high.

Articles by others on the same topic (0)

There are currently no matching articles.