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Secret Blogging Seminar Representation theory, geometry and whatever else we decide is worth writing about today. A team of six computer scientists (Lenstra, Hughes, Augier, Bos, Kleinjung and Wachter) are reporting a flaw in the way that certain SSL certificate issuers are generating RSA keys. This is getting significant online coverage at websites like NYTimes, Slashdot and BoingBoing, so I thou
Jacobson schemes are schemes that are locally the Spec of Jacobson rings. Jacobson rings are rings satisfying the Nullstellensatz (i.e. for any ideal I, the intersection of the maximal prime ideals containing I equals the intersection of the prime ideals containing I, and so equals the radical of I). Obviously any field k is Jacobson, and a general form of the Nullstellensatz says that if A is Jac
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