21. For example, C + + Standard Template Library, C # enumerables , etc. 22. All recursive languages are recursively enumerable . 23. The Matiyasevich / MDRP theorem has shown that recursively enumerable sets are equivalent to Diophantine sets. 24. If both a set A and its complement are recursively enumerable , then A is recursive. 25. Enumerable are the advantages resulting from the progress of Christianity here, as in other parts.26. The domain of any universal computable function is a computably enumerable set but never a computable set. 27. Wolfram advocates using models whose variations are enumerable and whose consequences are straightforward to compute and analyze. 28. The preimage of a recursively enumerable set under a partial recursive function is a recursively enumerable set. 29. The preimage of a recursively enumerable set under a partial recursive function is a recursively enumerable set. 30. Other texts use the definition in terms of enumerations, which is equivalent for recursively enumerable sets.
