Real Valued Functions for the BFKL Eigenvalue
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We consider known expressions for the eigenvalue of the Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation in N=4 super Yang-Mills theory as a real valued function of two variables. We define new real valued functions of two complex conjugate variables that have a definite complexity analogous to the weight of the nested harmonic sums. We argue that those functions span a general space of functions for the BFKL eigenvalue at any order of the perturbation theory.
1991 ◽
Vol 06
(23)
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pp. 2143-2154
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2014 ◽
Vol 181
(3)
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pp. 1522-1530
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