Post is best known for his work on polyadic groups, recursively enumerable sets, and degrees of unsolvability, as well as for his contribution to the unsolvability of problems in combinatorial mathematics.
Post ay pinakamahusay na kilala para sa kanyang trabaho sa polyadic grupo, recursively enumerable sets, at unti-unti ng unsolvability, pati na rin ang para sa kanyang kontribusyon sa unsolvability ng mga problema sa kombinatoryal matematika.