👉 An antichthon is a term used in mathematics to refer to an object that is not present at all. It can be thought of as an abstract or non-existent entity, often used to represent something that does not exist or is absent from the mathematical world. For example, if you are looking at a piece of paper and it appears to have no thickness, this would be considered an antichthon because there is no object present in the mathematical world that can compare to its absence. Similarly,