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 ...

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 ...

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 ...

For decades, mathematicians tried to come up with the optimal sofa shape to move around a corner. Post-doctoral student Jineon Baek posted a 100-page proof that claims to solve the problem. KUOW is ...

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 ...