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In the paper by A. J. Coleman, "The greatest mathematical paper of all time" (Math Intelligencer, 11, no. 3 (1989), 29-39), on page 30 there is a passing remark that the "Jordan form is due to Weierstrass". Can anyone give a reference to Weierstrass's publications or to a history source that discusses this?

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  • $\begingroup$ Stigler's law of eponymy in action! $\endgroup$ – LSpice May 30 at 0:05
  • $\begingroup$ Of course you have every right to reject the edit including a link to the paper, but I'll still leave it here in a comment: Coleman - The greatest mathematical paper of all time (MSN). $\endgroup$ – LSpice May 30 at 0:26
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    $\begingroup$ @LSpice: I only rejected the links which are not free, leaving the rest of your edit, for which I thank you. $\endgroup$ – Alexandre Eremenko May 30 at 0:40
  • $\begingroup$ I apologise for my aggressive tone, and appreciate your courtesy. I always think of easy access to papers as a good thing, but I respect the importance of a purist stance on free access. $\endgroup$ – LSpice May 30 at 1:16
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According to the following linked text, Weierstrass defined his equivalent form in a memoir presented to the Berlin Academy in 1868, two years prior to Jordan's Traite being published.

From Bartel L van der Waerden's A History of Algebra :

On the history of Jordan Normal Forms, see Thomas Hawkins "Weierstrass and the Theory of Matrices" Archive for History of Exact Sciences 17, p 119-163 (1977). In section four of this paper, Hawkins shows that Weierstrass, in his theory of Elementary Divisors, has already defined a normal form equivalent to that of Jordan. Weierstrass presented his fundamental memoir "Zur Theorie der bilinearen und quadratischen Formen" to the Berlin Academy in 1868 (Monatsberichte, p. 311-338 = Werke 2, p.19-44) two years before the publication of Jordan's Traite.

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Another nice source relative to this controversy between Weierstrass, Kronecker and Jordan is the review "Sur les progrès de la théorie des invariants projectifs" by Franz Meyer from 1897. As the link to Google books put earlier on MathOverflow does not seem to give access to the full text anymore, another link one can use is this one. The relevant discussion is between pages 27 and 35.

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