منابع مشابه
The Periods of Cataclysmic Variables
The present status of the period studies of cataclysmic variables is briefly reviewed, mainly from the observational point of view. A few comments on individual objects include EM Cyg, Z Cha, WZ Sge and AM CVn.
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15 صفحه اولOn the Periods of Some Graph Transformations
For any undirected graph with arbitrary integer values attached to the vertices, simultaneous updates are performed on these values, in which the value of a vertex is moved by 1 in the direction of the average of the values of the neighboring vertices. (A special rule applies when equality occurs.) It is shown these transformations always reach a cycle of length 1 or 2. On the periods of some g...
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We define some families of graphs and show that their graph hypersurfaces relative to coordinate simplices define mixed Tate motives. We show that the corresponding Feynman integrals evaluate to multiple zetas. Let G be a connected graph. To each edge e ∈ EG associate a variable αe, known as a Schwinger parameter, and consider the graph polynomial
متن کاملPeriods of Eisenstein Series and Some Applications
Bringmann, Guerzhoy, Ono, and the author recently developed an Eichler-Shimura theory for weakly holomorphic modular forms by studying associated period polynomials. Here we include the Eisenstein series in this theory. Classically, the periods of a weight k (k ≥ 4 will always denote an even integer) cusp form f = ∑ l≥1 af (l)q l (q := e with τ = x+ iy ∈ C with y > 0) on Γ := SL2(Z) are given by
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1910
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19101860307