Interesting Engineering on MSN4 天
Century-old triangle-to-square dissection puzzle finally solved by mathematicians
Mathematicians struggled to find the fewest number of pieces needed to cut an equilateral triangle and rearrange it into a ...
The n-Category Café6 天
The McGee Group
This is the unique (3,7)-cage, meaning a graph such that each vertex has 3 neighbors and the shortest cycle has length 7.