👉 Monisms are a type of algebraic structure in which there is only one element, and this element can be either a single number or a set. Monisms are also known as "singletons" because they consist of exactly one object. For example, the set of all even numbers (2, 4, 6, ...) forms a monism because it has exactly one element: the number 2. Monisms can be used to represent and manipulate algebraic expressions in various ways.