Y by
Located on the plane
rectangles with sides parallel to the coordinate axes. It is known that any rectangle intersects at least n rectangles. Prove that exists a rectangle that intersects all rectangles.
![$\left[ \frac43 n \right]$](http://latex.artofproblemsolving.com/5/7/3/573b83317cda45a122995e24bd885a3c14ab5ffa.png)
This post has been edited 1 time. Last edited by parmenides51, Sep 26, 2024, 11:19 PM