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2. Moving sofa problem - Wikipedia

   en.wikipedia.org/wiki/Moving_sofa_problem

   The area thus obtained is referred to as the sofa constant. The exact value of the sofa constant is an open problem. The leading solution, by Joseph L. Gerver, has a value of approximately 2.2195. In November 2024, Jineon Baek posted an arXiv preprint claiming that Gerver's value is optimal, which if true, would solve the moving sofa problem. [2]

3. Couch - Wikipedia

   en.wikipedia.org/wiki/Couch

   To conserve space, some sofas double as beds in the form of sofa beds, daybeds, or futons. A Kubus sofa by Josef Hoffmann (1910) A furniture set consisting of a sofa with two matching chairs [17] is known as a "chesterfield suite" [18] or "living-room suite". [19] In the UK, the word chesterfield was used to refer to any couch in the 1900s. A ...

4. List of furniture types - Wikipedia

   en.wikipedia.org/wiki/List_of_furniture_types

   This is a list of furniture types. Furniture can be free-standing or built-in to a building. [1] They typically include pieces such as chairs, tables, storage units, and desks. [1] These objects are usually kept in a house or other building to make it suitable or comfortable for living or working in.

5. Sofa bed - Wikipedia

   en.wikipedia.org/wiki/Sofa_bed

   Although most sofa beds use a queen short mattress measuring 150 cm × 185 cm (60 in × 72 in), other common sizes include 145 cm × 185 cm (58 in × 72 in), 135 cm × 185 cm (54 in × 72 in), and 130 cm × 185 cm (52 in × 72 in). The average sofa bed mattress thickness is 11 cm (4.5 in).

6. Bed - Wikipedia

   en.wikipedia.org/wiki/Bed

   A sofabed ("pull-out" or "pull-out bed") is a folding bed that is stored inside a sofa. Sofa beds are also called "convertibles" and "hideaways." A state bed developed in Early Modern Europe from a hieratic canopy of state. A toddler bed is a small bed for young children.

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