New posts in Combinatorial Geometry

Circle enclosing all but one of $n$ points

Positivity of the alternating sum associated to at most five subspaces

Tiling of a $9\times 7$ rectangle

Choose $3n$ points on a circle, show that there are two diametrically opposite point

Minesweeper probability

Countably Infinitely Many Points in a Euclidean Space with Restraining Orders

Maximum $C$ such that every shape in $\Bbb R^2$ with area $<C$ can be placed to avoid $\Bbb Z^2$

Partition rectangle into finite number of squares

What is the maximum number of pieces that a pizza can be cut into by 7 knife cuts? (NBHM 2005)

Proof a $2^n$ by $2^n$ board can be filled using L shaped trominoes and 1 monomino