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In mathematics, the Ravenel conjectures are a set of mathematical conjectures in the field of stable homotopy theory posed by Douglas Ravenel at the end of a paper published in 1984.[1] It was earlier circulated in preprint.[2] The problems involved have largely been resolved, with all but the "telescope conjecture" being proved in later papers by others.[3][4] The telescope conjecture is now generally believed not to be true, though there are some conflicting claims concerning it in the published literature, and is taken to be an open problem.[2] Ravenel's conjectures exerted influence on the field through the founding of the approach of chromatic homotopy theory.

The first of the seven conjectures, then the nilpotence conjecture, is now the nilpotence theorem. The telescope conjecture, which was #4 on the original list, remains of substantial interest because of its connection with the convergence of an Adams–Novikov spectral sequence. While opinion is against the truth of the original statement, investigations of associated phenomena (for a triangulated category in general) have become a research area in its own right.[5]


Localization with Respect to Certain Periodic Homology Theories, Author(s): Douglas C. Ravenel, Source: American Journal of Mathematics, Vol. 106, No. 2, (Apr., 1984), pp. 351-414, Published by: The Johns Hopkins University Press, Stable URL: ,Accessed: 20/08/2008 11:51
Homology, Homotopy and Applications, Volume 10 (2008) Number 3, Proceedings of a Conference in Honor of Douglas C. Ravenel and W. Stephen Wilson, The mathematical work of Douglas C. Ravenel
Devinatz, Ethan S.; Hopkins, Michael J.; Smith, Jeffrey H. (1988), "Nilpotence and stable homotopy theory. I", Annals of Mathematics. Second Series 128 (2): 207–241, doi:10.2307/1971440, ISSN 0003-486X, MR 960945
Nilpotence and Stable Homotopy Theory II, JSTOR 120991
page. 25 of PDF, Subcategories of Triangulated Categories and the Smashing Conjecture, Dissertation zur Erlangung des akademischen Grades, Doktor der Naturwissenschaften (Dr. rer. nat.), vorgelegt von, Kristian Brüning, May 2007.

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