The movement of a moving sofa in the perspective of hallway (top) and sofa (bottom). Credit: arXiv (2024). DOI: 10.48550/arxiv.2411.19826 A mathematician at Yonsei University, in Korea, claims to have ...

Mathematicians aren't usually the first point of call on moving day. And really, why should they be? For nearly 60 years, they couldn't even tell you whether your fancy new three-seat sofa would make ...

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 ...

When you’re hauling a couch through a narrow hallway and yelling “Pivot!” like Ross from Friends, you’re unwittingly grappling with a half-century-old mathematical conundrum. Known as the Moving Sofa ...