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20 votes
2 answers
25k views

Partitioning a polygon into convex parts

I'm looking for an algorithm to partition any simple closed polygon into convex sub-polygons--preferably as few as possible. I know almost nothing about this subject, so I've been searching on Google ...
user14059's user avatar
  • 201
9 votes
3 answers
3k views

Complexity of matching red and blue points in the plane.

I'm just asking because I'm curious. I was seeking references on the following problem, that a friend exposed to me last holidays : Problem Given $n$ red points and $n$ blue points in the plane in ...
Thomas Richard's user avatar
7 votes
1 answer
3k views

Any reference to an algorithm for finding the largest empty circle on a sphere (with great-circle distance)?

Given a set $S$ of 2D points in the plane, there are known algorithms for finding the largest empty circle ($LEC$) of the set of points. The $LEC$ problem is stated in this way: find a $LEC$ whose ...
Alessandro Jacopson's user avatar
4 votes
1 answer
519 views

A brief question about the "Eight Queens" Puzzle

The classical Eight Queens puzzle asks whether it is possible to arrange $ 8 $ queens on an $ 8 \times 8 $ chess board, so that no two queens attack each other. It is well-known that such ...
Boggie Georgiev's user avatar
4 votes
1 answer
204 views

Reference: Packing under translation is in NP

I am looking for a reference for a result that I am aware of. Let me describe the result. Given a polygon $C$ and polygons $p_1,\ldots,p_n$, it can be decided in NP time, if $p_1,\ldots,p_n$ can be ...
Till's user avatar
  • 479
3 votes
0 answers
169 views

Computing Voronoi poles in $\mathbb{R}^d$ (the farthest points within each cell)

Say I have a Voronoi diagram of some points $p_1,\dots,p_n\in\mathbb{R}^d$, which tesselates $\mathbb{R}^d$ into cells $V_1,\dots,V_n$. Within each cell $V_i$, the pole is defined as the vertex of $...
Victor Tu's user avatar