Identity or Equation

Statement form sorts theorems by the shape of the claim they make, such as an equation, an inequality or an existence statement. Wikipedia states Fermat's Last Theorem as the claim "that there are no positive integers a, b, c, n with n greater than 2 such that a to the n plus b to the n equals c to the n," a negative existence claim rather than a formula to compute with. This dimension groups theorems that make the same kind of mathematical statement.