👉 Closed math refers to a branch of mathematics where all theorems and proofs are derived from a finite, fixed set of axioms without relying on additional assumptions beyond these axioms. In closed math systems, every statement can be rigorously proven or disproven using only the given axioms and logical rules. This contrasts with open math, where some assumptions or axioms might be taken for granted or extended beyond the initial set. Closed math emphasizes a strict, self-contained logical framework, ensuring that every mathematical truth within the system is derivable from a minimal and well-defined set of foundational principles.