Ritz, Nepomuk ORCID: 0009-0006-5173-5201; Ge, Anxiang ORCID: 0009-0002-6603-4310; Frankenbach, Markus ORCID: 0009-0002-8907-0031; Pelz, Mathias ORCID: 0009-0001-3282-6742; von Delft, Jan ORCID: 0000-0002-8655-0999; Kugler, Fabian B. ORCID: 0000-0002-3108-6607 (2025): Testing the parquet equations and the U(1) Ward identity for real-frequency correlation functions from the multipoint numerical renormalization group. Physical Review Research (7): 033139. ISSN 2643-1564