Now that pandemic restrictions are easing up, people are getting together again. But it’s been a while, so if you and your friends need some help breaking the ice, here’s a mathematical party game you ...

Ram Murty of Queen’s University in Kingston, Ontario have translated the problem of solving a sudoku puzzle into the language of graph theory. The 81 squares in the grid correspond to vertices ...

Your solution might look slightly different, but you’ll end up with the same essential structure, which is easier to see if you move the vertices around a bit. This “star” structure in graph theory ...

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But in theory ... of each node in the graph and assigns it a color. The different colors thus assigned allow the algorithm to ...