{"id": "card_chain_riemann_1859", "kind": "reference", "title": "Riemann 1859 — Über die Anzahl der Primzahlen unter einer gegebenen Grösse", "body": "B. Riemann (1859). Über die Anzahl der Primzahlen unter einer gegebenen Grösse. Monatsber. Berliner Akad. (1859) 671–680. Canonical: https://www.claymath.org/collections/riemanns-1859-manuscript/. Free copy: https://www.claymath.org/collections/riemanns-1859-manuscript/. License as found: public domain (the author died more than a century ago, or the work was published before 1930). What it gave the chain: zeta continued to the plane, the functional equation, the explicit formula through log zeta, and the hypothesis.", "source": {"label": "B. Riemann (1859), Monatsber. Berliner Akad. 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