👉 Fidelities in mathematics are a type of property that is defined as the property of being able to be expressed using only one variable. Fidelities can be used to represent various mathematical objects, such as polynomials or functions. In linear algebra, for example, if we have a vector space V over a field K and a basis B, then the fidelity of a vector v in V is defined as: f(v) = 1 (mod n), where n is the dimension
