Zobrazeno 1 - 6
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pro vyhledávání: '"Johan Brannlund"'
Publikováno v:
Physica D: Nonlinear Phenomena. 238:1161-1167
The problem of dividing a network into communities is extremely complex and grows very rapidly with the number of nodes and edges that are involved. In order to develop good algorithms to identify optimal community divisions it is extremely beneficia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb1312d65181d013095032e41fcdeb37
https://doi.org/10.1016/j.physd.2009.03.015
https://doi.org/10.1016/j.physd.2009.03.015
The question of the averaging of inhomogeneous spacetimes in cosmology is important for the correct interpretation of cosmological data. In this paper we suggest a conceptually simpler approach to averaging in cosmology based on the averaging of scal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0989414ec15b04f94274134c44577dcf
We construct a framework within which a mathematically precise, fully covariant, and exact averaging procedure for tensor fields on a manifold can be formulated. In particular, we introduce the Weitzenböck connection for parallel transport and argue
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4efa53bfce62c335653aebab20d44afc
In the context of loop quantum gravity, we construct the phase-space of isolated horizons with genus greater than 0. Within the loop quantum gravity framework, these horizons are described by genus g surfaces with N punctures and the dimension of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::991b14909a412780eab910bae73d2674
Autor:
Johan Brannlund
It was pointed out by Couch and Torrence that the extreme Reissner-Nordstrom solution possesses a discrete conformal isometry. Using results of Romans, it is shown that such a symmetry also exists when a non-zero cosmological constant is allowed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67a9b95ba8758167cce8bd7a1fab83c1
http://arxiv.org/abs/gr-qc/0306074
http://arxiv.org/abs/gr-qc/0306074
Publikováno v:
Classical and Quantum Gravity. 31:095011
We consider the quantization of space-times which can possess different topologies within a symmetry reduced version of Wheeler-DeWitt theory. The quantum states are defined from a natural decomposition as an outer-product of a topological state, dic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd4dcf46b1f381b65d609ee55c0bd705
https://doi.org/10.1088/0264-9381/31/9/095011
https://doi.org/10.1088/0264-9381/31/9/095011