EntityQ2635526· pop 20· linked from 14 articlesmoving sofa problemSign in to savemathematical problem about moving the largest possible shape around a 90° cornerConnectionsQ118398Entitylist of unsolved problems in mathematicsEntityupper and lower boundsEntitymathematicsEntityareaEntityInternational Standard Book NumberEntityDouglas AdamsEntityQ79784Entitydigital object identifierEntityInternational Standard Serial NumberEntitydiskEntityJSTOREntityRutgers UniversityEntityOn-Line Encyclopedia of Integer SequencesEntityMathWorldEntityQ22908627EntitySpringer Science+Business MediaEntityEric W. WeissteinEntityIan StewartEntityMathcadEntityCategories1966 introductionsCouchesDiscrete geometryRecreational mathematicsUnsolved problems in geometry