منابع مشابه
Barbara Duncum
Barbara Mary Pycraft was born on 22 February 1910. Her father, William Pycraft, was an ornithologist on the staff of the Natural History Museum, South Kensington, and the author of several books. After reading history at London University she was appointed research assistant at the Wellcome Medical History Museum, still in Wigmore Street, in the spring of 1931. Her first work involved the class...
متن کاملWEYL CURVATURE , EINSTEIN METRICS , AND SEIBERG - WITTEN THEORY Claude LeBrun
We show that solutions of the Seiberg-Witten equations lead to nontrivial estimates for the L2-norm of the Weyl curvature of a compact Riemannian 4-manifold. These estimates are then used to derive new obstructions to the existence of Einstein metrics on smooth compact 4-manifolds with a non-zero Seiberg-Witten invariant. These results considerably refine those previously obtained [21] by using...
متن کاملOn Pluri-half-anticanonical System of Lebrun Twistor Spaces
In this note, we investigate pluri-half-anticanonical systems on the so called LeBrun twistor spaces. We determine its dimension, the base locus, structure of the associated rational map, and also structure of general members, in precise form. In particular, we show that if n ≥ 3 and m ≥ 2, the base locus of the system |mK| on nCP consists of two non-singular rational curves, along which any me...
متن کاملThe Honorable Barbara
The staff of the Federal Trade Commission is pleased to respond to your letter of April 7, 1989, inviting our comments on House Bill 165. 1 The bill would add sections 11.75 to the Business corporation Act regulating certain business combinations and amend Section 6.05 of the Act specifically authorizing "poison pills." We believe that these provisions are likely to deter takeovers that may inc...
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ژورنال
عنوان ژورنال: Volume!
سال: 2022
ISSN: ['1950-568X', '2117-4148', '1634-5495']
DOI: https://doi.org/10.4000/volume.10474