While waiting for your appointment to start, one's eyes wonder around the room looking for something to ward off boredom. So, looking at this wall hanging, one wonder about the four color theorem that states that no more than four colors are required to color the regions of any map so that no two adjacent regions have the same color.
""The world is full of obvious things which nobody by any chance ever observes…""
— Arthur Conan Doyle
“The Hound of the Baskervilles”
""Mathematics...
