👉 Copens are a type of mathematical object that are used in the study of topology and geometry. They are named after the Greek letter "χ", which is often used to denote continuity or openness, but can also be used for other properties of shapes. In topology, a copen is a closed curve (also known as an arc) that bounds a region in space. The term "copen" comes from the Greek words "κόπης" (kopês), which means
