All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Just Math
3 points colinear? No way! (Posted on 2005-05-19) Difficulty: 5 of 5
For any grid, x by x, figure out a formula for the greatest number of points that can be put on the inside of the grid such that no three points are colinear.

No Solution Yet Submitted by Corey    
Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
So at least the first 32 are reachable... | Comment 7 of 14 |

There is a sequence for the number of possibilities for each n.

It is a little suprising the number of solutions with 2n points increases rapidly given they get so hard to find.  Its also suprising to see it conjectured that for large grids the upper limit is only about 1.87n

I can't imagine the run-times for programs searching for large cases.

Also a note to McWorter:  to keep you post from skipping lines when you hit enter, use shift-enter. 

  Posted by Jer on 2005-05-20 12:09:20
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (5)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information