Search

Science fiction has close ties with science, as we know, but this article focuses more specifically on the words of science, the scientific vocabulary, which we often find in science fiction texts and, in particular, on the enlightening way in which science fiction authors depict, in their narratives, either discourse about science or the discourse of scientists about science. Essentially, the vocabulary of science helps authors to build fictional worlds, and, in return science fiction narratives echo the cultural representations of science, in different contexts and periods. By so doing they contribute at times to question the scientific approach itself, while at the same time stimulating readers’ curiosity about science, including the youngest readers.

Abstract: We prove that the selection space of a nondegenerate dendrite is homeomorphic to . [Copyright &y& Elsevier]

Abstract: The moving average processes in a separable infinite-dimensional Hilbert space H, denoted by , is a H valued process satisfying the equation where l is a compact operator in H and a H valued strong white noise. In this Note we propose two estimators for l based on the moment equation of the process. To cite this article: C. Turbillon et al., C. R. Acad. Sci. Paris, Ser. I 346 (2008). [Copyright &y& Elsevier]

Abstract: In this Note, we state and give the main ideas of the proof of a real convexity theorem for group-valued momentum maps. This result is a quasi-Hamiltonian analogue of the O''Shea–Sjamaar theorem in the usual Hamiltonian setting. We prove here that the image under the momentum map of the fixed-point set of a form-reversing involution defined on a quasi-Hamiltonian space is a convex polytope, that we describe as a subpolytope of the momentum polytope. To cite this article: F. Schaffhauser, C. R. Acad. Sci. Paris, Ser. I 345 (2007). [Copyright &y& Elsevier]

Abstract: We show that there is no immersed compact Levi-flat hypersurface of class in the complex projective plane, if the foliation by holomorphic curves carries a harmonic current which is absolutely continuous with respect to the Lebesgue measure, with a density bounded from above and below. This is a corollary of a rigidity result for immersed compact Levi-flat hypersurfaces in complex surfaces of non-negative curvature. [Copyright &y& Elsevier]

A rotationally symmetric, compact, oriented, connected, uniformly convex hypersurface M0 of Rn+1, with boundary ∂M0 in a rotationally symmetric cone S, is evolving under volume-preserving mean curvature flow. Then for n⩾2, we obtain gradient and curvature estimates, leading to long-time existence of the flow, and convergence to a part of a round sphere. [Copyright &y& Elsevier]

We study linear processes in Hilbert spaces in the context of linearly closed subspaces in the sense of Fortet. To cite this article: D. Bosq, C. R. Acad. Sci. Paris, Ser. I 337 (2003). [Copyright &y& Elsevier]

Abstract: Building upon a result of J. Kollár on special fibres of families of hypersurfaces whose generic fibre satisfies the -hypothesis, we establish a property of special fibres of families of hypersurfaces whose generic fibre satisfies the -hypothesis. To cite this article: J.-L. Colliot-Thélène, C. R. Acad. Sci. Paris, Ser. I 346 (2008). [Copyright &y& Elsevier]