I find numerous claims that the Basel Problem was first posed by Pietro Mengoli in 1644. However, I am unable to find even the name of the publication (or book or letter) in which this was supposedly done.
I am hoping someone will help me.
(My suspicion is that this might be an academic urban legend. Mengoli would have been 18 years old in 1644 and the earliest publication I can find of his is his 1650 Novae quadraturae arithmeticae.)
Related question: Where (if at all) in Novae quadraturae arithmeticae (1650) does Mengoli pose the Basel Problem? (Unfortunately I don't know any Latin and there doesn't seem to be any translation of this work.)
Below is a list of references claiming that Mengoli first posed the Basel Problem in 1644.
All fail to cite the name of the avenue in which he did so.
And only two even bother citing anything at all for their claim. One (Mathworld) does so to another book on this list, while the other's (Benko, 2012) citations are incorrect.
- "The Riemann Zeta Function With Even Arguments as Sums Over Integer Partitions" (2017, p. 554) by Mircea Merca.
- "Explorations in the theory of partition zeta functions" (2016, p. 2) by Ono, Reilen, and Schneider.
- "Some integrals related to the Basel problem" (2016, p. 1) by Khristo Boyadzhiev.
- "The Connection between the Basel Problem and a Special Integral" (2014, p. 2570) by Zhou and Xu.
- "The Basel Problem as a Rearrangement of Series" (2013, p. 171) by David Benko and John Molokach.
- "The Basel Problem as a Telescoping Series", (2012, p. 244) by David Benko.
Benko (2012) incorrectly cites (i) William Dunham who does not give any specific year (Euler: The Master of Us All, 1999, p. 42); and (ii) Julian Havil who gives the year of 1650 and does not mention 1644 (2003, Gamma: Exploring Euler's Constant, p. 38).
- "A simple solution to Basel problem" (2008, p. 111) by Mircea Ivan.
- "Euler’s Solution of the Basel Problem" (2003, p. 2) by Ed Sandifer
- Anthony Sofo in Mathematical Analysis and Applications: Selected Topics (2018).
- Exploring the Riemann Zeta Function: 190 years from Riemann's Birth (2017, p. 224), edited by Montgomery, Nikeghbali, and Rassias.
- Phi, Pi, e and i (2017, p. 47), by David Perkins.
- Problem-Solving and Selected Topics in Number Theory: In the Spirit of the Mathematical Olympiads (2010, p. 91) by Michael Rassias.
- How Euler Did It (2007, p. 205) by Edward Sandifer
- Prime Obsession (2003, p. 370), by John Derbyshire.
- Wikipedia entry on Pietro Mengoli.
- ProofWiki entry on Pietro Mengoli.
- Mathworld entry on "Riemann Zeta Function zeta(2)".
Mathworld cites Derbyshire (2003, p. 370, already given above).
- Brendan Sullivan's 2013 Beamer presentation on the Basel Problem (when googling "Basel problem", this is the second result after Wikipedia).