A 31-year-old Korean mathematician solved one of the oldest math puzzles and was recognized as one of Scientific American’s top math breakthroughs of 2025.

Mathematician finally solves infamous moving sofa problem popularised by Friends ‘pivot’ scene - Scientific American jokes that ‘explaining the ‘Pivot!’ shouted by Ross Geller required a 119-page pape ...

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 ...