This essentially set out in mathematical terms a puzzle ... For example, if you have a semi-circular sofa with a radius the same width as the corridor you can easily bump the area up to 1.57 ...
From spilt chai to toddler artwork, your sofa often becomes the target of life's messy moments. But don't worry - with the right cleaning methods you can restore your couch to its pristine condition.
In 1992, mathematician Joseph Gerwer of Rutgers University set the lower bound for a sofa at 2.2195 units ... That is, Ross could have avoided the problem if he had only considered the Gerver sofa ...
The use of material resources has increased more than ten times since 1900 and is set to double again by 2030 ... leads to environmental degradation and increased vulnerability to climate change.