Any fan of 'Friends' knows there's only one way to get a sofa around a tight corner: Pivot! However, while this might not have worked out so well in that iconic scene, mathematicians have now revealed ...

A Korean mathematician has solved one of geometry’s most stubborn puzzles, ending a problem that has challenged researchers for nearly 60 years and earning global recognition for a proof achieved ...

In a scene from the classic sitcom, "Friends," the characters Ross, Rachel and Chandler struggle to heft a new couch up the stairs of their apartment building. As they try to get the sofa around the ...

Twenty-five years too late to help Ross get his new couch into his apartment in "Friends," a mathematician has finally solved the pesky "sofa problem." The math problem delineates the largest-size ...

The moving sofa problem, which deals with the math of how shapes can fit around corners, may have been solved by a Korean mathematician. UC Davis mathematician Dan Romik has made a study of the ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...