Counterexample (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Counterexample" in English language version.

Last modified: 06:09:56, 6 August 2026 (UTC)

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ams.org (Global: 434^th place; English: 249^th place)

Lander, Parkin (1966). "Counterexample to Euler's conjecture on sums of like powers" (PDF). Bulletin of the American Mathematical Society. 72 (6). Americal Mathematical Society: 1079. doi:10.1090/s0002-9904-1966-11654-3. ISSN 0273-0979. Retrieved 2 August 2018.
Elkies, Noam (October 1988). "On A4 + B4 + C4 = D4" (PDF). Mathematics of Computation. 51 (184): 825–835.

cut-the-knot.org (Global: low place; English: low place)

"What Is Counterexample?". www.cut-the-knot.org. Retrieved 2019-11-28.

doi.org (Global: 2^nd place; English: 2^nd place)

Lander, Parkin (1966). "Counterexample to Euler's conjecture on sums of like powers" (PDF). Bulletin of the American Mathematical Society. 72 (6). Americal Mathematical Society: 1079. doi:10.1090/s0002-9904-1966-11654-3. ISSN 0273-0979. Retrieved 2 August 2018.

hathitrust.org (Global: 296^th place; English: 153^rd place)

catalog.hathitrust.org

Plato (1952). Gorgias. Critias. New York: Liberal Arts Press. pp. 488e–489a.

mathwords.com (Global: low place; English: low place)

"Mathwords: Counterexample". www.mathwords.com. Retrieved 2019-11-28.

wolfram.com (Global: 1,091^st place; English: 1,169^th place)

mathworld.wolfram.com

Weisstein, Eric W. "Counterexample". mathworld.wolfram.com. Retrieved 2019-11-28.

worldcat.org (Global: 4^th place; English: 4^th place)

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Lander, Parkin (1966). "Counterexample to Euler's conjecture on sums of like powers" (PDF). Bulletin of the American Mathematical Society. 72 (6). Americal Mathematical Society: 1079. doi:10.1090/s0002-9904-1966-11654-3. ISSN 0273-0979. Retrieved 2 August 2018.

x.com (Global: 58^th place; English: 125^th place)

Posted on July 20, 2026 (https://x.com/__alpoge__/status/2079028340955197566): "hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0)"