What is lex luthor s relationship to superman in the dc universe?

The provided evidence only confirms the existence of the character Superman within the DC Universe. It does not contain any details about Lex Luthor or any interaction or relationship between these two characters. Consequently, we cannot determine whether Lex Luthor is an ally, adversary, or has any other type of connection to Superman based solely on the available data. If you need more specific information about their relationship, additional sources would be required. Until such sources are provided, the relationship remains unspecified.