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Computability of the causal boundary by using isocausality
Computability of the causal boundary by using isocausalityar Recently, a new viewpoint on the classical c-boundary in Mathematical Relativity has been developed, the relations of this boundary with the conformal one and other classical boundaries have been analyzed, and its computation in some classes of spacetimes, as the standard stationary ones, has been carried out. In the present paper, we consider the notion of isocausality given by...
43 p pdu 25/09/2012 139 1
Từ khóa: mathematical relativity, nathematical physics, general relativity, quantum cosmology, Differential Geometry, toán lý, học thuyết vũ trụ tương đối
WILD QUOTIENT SURFACE SINGULARITIES WHOSE DUAL GRAPHS ARE NOT STAR-SHAPED
We obtain some results that answer certain questions of Lorenzini on wild quotient singularities in dimension two. Using Kato’s theory of log structures and log regularity, we prove that the dual graph of exceptional curves on the resolution of singularities contains at least one node. Furthermore, we show that diagonal quotients for Hermitian curves by analogues of Heisenberg groups lead to examples of wild quotient singularities where the...
35 p pdu 25/09/2012 120 1
Từ khóa: Algebraic geometry, mathematics, geometry, hình học đại số, toán học, algebraic number theory, real algebraic geometry.
Mathematical Methods in Image Reconstruction
.Mathematical Methods in Image Reconstruction .S1AM Monographs on Mathematical Modeling and Computation About the Series In 1997, SIAM began a new series on mathematical modeling and computation. Books in the series develop a focused topic from its genesis to the current state of the art; these books • present modern mathematical developments with direct applications in science and engineering; • describe mathematical issues arising in...
229 p pdu 20/04/2012 93 1
Từ khóa: geometry, tomography, biography, algorithm, transform, resolution
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