\[CodeNumber \left( c \right) \land \\ \left( \exists l < c \right) \left[ Length \left( c, l \right) \land IthElement \left( a, l, c \right) \land \\ \left( \forall i \leq l \right) \left( \forall e ...CodeNumber(c)∧(∃l<c)[Length(c,l)∧IthElement(a,l,c)∧(∀i≤l)(∀e<c)(IthElement(e,i,c)→BaseCaseSet(e)∨(∃j<i)(∃ej<c)(IthElement(ej,j,c)∧ConstructionSet(ej,e)))].