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Mean action and the Calabi invariant. In some previous posts on this blog, for example here. I discussed the question of short Reeb orbits. Namely, given a contact form. Still an interesting question to think about.
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Die Welt, der Himmel,. Jesus Christus, der Auferstandene, das bedeutet, dass Gott aus Liebe und Allmacht dem Tod ein Ende macht und eine neue Schöpfung ins Leben ruft, neues Leben schenkt. Mehr dazu finden Sie in der Datenschutzerklärung.
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When the sphere is not round I. This is the first of a series of posts concerning the geometry of unit spheres in normed spaces with the aim of attracting the attention of fellow geometers to a number of delightful open problems. I will start with a couple of problems posed by Juan Jorge Schäffer in his book. 8221;Geometry of Spheres in Normed Spaces. 8221;, Lecture Notes in Pure and Appl. 20, Dekker, NY, 1976.