A Korean researcher who solved the “Moving Sofa Problem,” a mathematical challenge that had puzzled mathematicians for nearly ...

Dr Baek Jin Eon, 31, a research fellow at the Korea Institute for Advanced Study, has demonstrated that no shape larger than ...

For those who have wrestled a bulky couch around a tight corner and lamented, “Will this ever get through?” mathematicians have heard your pleas. Geometry’s “moving sofa problem” asks for the largest ...