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Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-52289-0
Abstract: Real-valued functions of complex arguments violate the Cauchy-Riemann conditions and, consequently, do not have Taylor series expansion. Therefore, optimization methods based on derivatives cannot be directly applied to this class of functions. This is circumvented…
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Keywords:
stochastic optimization;
quantum tomography;
optimization;
complex arguments ... See more keywords
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Published in 2017 at "Analysis and Applications"
DOI: 10.1142/s0219530516500093
Abstract: We prove that the function Γ(x + a)Γ(x + b)/|Γ(x + c + iy)|2,a + b = 2c, and its q-analogue are of the form e−h(x,y) and h is completely monotonic in x. In particular…
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Keywords:
gamma functions;
functions complex;
complex arguments;
inequalities gamma ... See more keywords