## Posts Tagged ‘combinatorics’

### Counting triangles on a tin ceiling (solution, take 2)

Posted by: **Dave Richeson** on February 10, 2011

### Counting triangles on a tin ceiling

Posted by: **Dave Richeson** on February 10, 2011

### Lipson’s mathematical LEGO sculptures

Posted by: **Dave Richeson** on October 14, 2008