Stefano degli Angeli
Italian mathematician and philosopher (1623-1697)
Stefano degli Angeli (Venice, 23 September 1623 – Padua, 11 October 1697) was an Italian mathematician, philosopher, and Jesuate.
He was a member of the Catholic Order of the Jesuats (Jesuati). In 1668, the order was suppressed by Pope Clement IX. Angeli was a student of Bonaventura Cavalieri. From 1662 until his death, he taught at the University of Padua.
From 1654 to 1667, he devoted himself to the study of geometry, continuing the research of Cavalieri and Evangelista Torricelli based on the method of Indivisibles. He then moved on to mechanics, where he often found himself in conflict with Giovanni Alfonso Borelli and Giovanni Riccioli.
Jean-Étienne Montucla in his monumental Histoire des mathématiques (Paris, 1758), lavishes praise on Angeli (II, p. 69).
Move to Venice and defence of indivisibles
Angeli moved from Rome to his native city of Venice in 1652 and began publishing on the method of indivisibles. The method had been under attack by Jesuits Paul Guldin, Mario Bettini, and André Tacquet.
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Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Feb 28, 2026. The linked authority identifier is Q3498009. VIAF identifies the subject as 11351307. The Library of Congress control number is n87103136. 3 of 6 selected statements include explicit references; 2 carry qualifiers and 1 use preferred rank. The first chronological checks are 1623, 1697, 1668 and 1662.
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This entry incorporates text from “Stefano degli Angeli” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.