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 ...

What is the largest sofa that you can squeeze around the corner of a hallway? A horseshoe-shaped piece of furniture known as Gerver’s sofa has officially taken the crown, solving a mathematical ...