An analytical formula for the argument of the gamma function as a complex quantityстатья
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Аннотация:In the first quadrant of the complex plane, a new representation of the countable-valued function Arg Г(z) containing an improper integral of a special form is found. A formula for the principal argument is also discussed. This result, together with known properties of the gamma function, makes it possible to evaluate arg Г(z) at points z of the other quadrants. Illustrative examples are analyzed. The obtained relations may be useful, e.g., in solving problems related to asymptotics of solutions to nonlinear differential equations of mathematical physics.