Jeroen Demeyer

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In this paper, we describe a new infinite family of q 2 −1 2-tight sets in the hyperbolic quadrics Q + (5, q), for q ≡ 5 or 9 mod 12. Under the Klein correspondence, these correspond to Cameron–Liebler line classes of PG(3, q) having parameter q 2 −1 2. This is the second known infinite family of nontrivial Cameron–Liebler line classes, the first family(More)
Flecainide, a new Vaughan-Williams Class Ic anti-arrhythmic agent, was used in 21 patients with an accessory AV conduction pathway which was apparent in 16 cases (WPW syndrome), latent in 1 case and concealed in 4 cases (block in the anterograde direction). Seventeen patients had spontaneous and inducible arrhythmias; 13 supraventricular tachycardias (SVT)(More)
Let K be a field with a valuation satisfying the following conditions: both K and the residue field k have characteristic zero; the value group is not 2-divisible; there exists a maximal subfield F in the valuation ring such that Gal(¯ F /F) and Gal(¯ k/k) have the same 2-cohomological dimension and this dimension is finite. Then Hilbert's Tenth Problem has(More)
As developers of SageMath, we show how open software facilitates corrections. " Commercial computer algebra systems are black boxes, and their algorithms are opaque to the users, " complained a trio of mathematicians whose " misfortunes " are detailed in a recent Notices article [2]. " We reported the bug on October 7, 2013…By June 2014, nothing had changed(More)
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